{"id":4915,"date":"2025-12-22T18:57:29","date_gmt":"2025-12-22T18:57:29","guid":{"rendered":"https:\/\/murreeroad.org\/?p=4915"},"modified":"2025-12-22T18:57:29","modified_gmt":"2025-12-22T18:57:29","slug":"plant-physiology-mcqs-with-answers-100-multiple-choice-questions","status":"publish","type":"post","link":"https:\/\/learn-nest.murreeroad.org\/blog\/plant-physiology-mcqs-with-answers-100-multiple-choice-questions\/","title":{"rendered":"Plant Physiology MCQs with Answers \u2013 100 Multiple Choice Questions"},"content":{"rendered":"<p>Practice 100 Plant Physiology <a href=\"https:\/\/murreeroad.org\/category\/mcqs\/\">MCQs<\/a> with answers covering photosynthesis, respiration, transpiration, mineral nutrition, plant hormones, and water transport\u2014ideal for students and exams.<\/p>\n<p>Plant Physiology is a core branch of biology that explores how plants function, grow, and respond to their environment. Understanding key processes such as photosynthesis, respiration, transpiration, mineral nutrition, water transport, and the role of plant hormones is essential for students and competitive exam aspirants. This article presents <strong data-start=\"449\" data-end=\"510\">100 carefully prepared Plant Physiology MCQs with answers<\/strong>, designed to strengthen conceptual understanding, support quick revision, and improve exam performance. These <strong data-start=\"621\" data-end=\"667\">plant physiology <a href=\"https:\/\/murreeroad.org\/category\/mcqs\/\">multiple choice questions<\/a><\/strong> are ideal for school exams, entrance tests, and general biology practice.<\/p>\n<p data-start=\"0\" data-end=\"163\">Sure! Below are <strong data-start=\"16\" data-end=\"76\">100 Multiple Choice Questions (MCQs) on Plant Physiology<\/strong>, written in clear and correct <strong data-start=\"107\" data-end=\"118\">English<\/strong>, suitable for exams, practice, and revision.<\/p>\n<hr data-start=\"165\" data-end=\"168\" \/>\n<h2 data-start=\"170\" data-end=\"216\">\ud83c\udf3f Plant Physiology \u2013 100 MCQs with Answers<\/h2>\n<h3 data-start=\"218\" data-end=\"258\">1. Plant Physiology is the study of:<\/h3>\n<p data-start=\"259\" data-end=\"375\">A. Plant structure<br data-start=\"277\" data-end=\"280\" \/>B. Plant classification<br data-start=\"303\" data-end=\"306\" \/>C. Plant functions and processes<br data-start=\"338\" data-end=\"341\" \/>D. Plant evolution<br data-start=\"359\" data-end=\"362\" \/><strong data-start=\"362\" data-end=\"375\">Answer: C<\/strong><\/p>\n<h3 data-start=\"377\" data-end=\"432\">2. The process by which plants make food is called:<\/h3>\n<p data-start=\"433\" data-end=\"519\">A. Respiration<br data-start=\"447\" data-end=\"450\" \/>B. Transpiration<br data-start=\"466\" data-end=\"469\" \/>C. Photosynthesis<br data-start=\"486\" data-end=\"489\" \/>D. Germination<br data-start=\"503\" data-end=\"506\" \/><strong data-start=\"506\" data-end=\"519\">Answer: C<\/strong><\/p>\n<h3 data-start=\"521\" data-end=\"552\">3. Chlorophyll is found in:<\/h3>\n<p data-start=\"553\" data-end=\"631\">A. Mitochondria<br data-start=\"568\" data-end=\"571\" \/>B. Ribosomes<br data-start=\"583\" data-end=\"586\" \/>C. Chloroplasts<br data-start=\"601\" data-end=\"604\" \/>D. Vacuoles<br data-start=\"615\" data-end=\"618\" \/><strong data-start=\"618\" data-end=\"631\">Answer: C<\/strong><\/p>\n<h3 data-start=\"633\" data-end=\"687\">4. The main pigment involved in photosynthesis is:<\/h3>\n<p data-start=\"688\" data-end=\"768\">A. Carotene<br data-start=\"699\" data-end=\"702\" \/>B. Xanthophyll<br data-start=\"716\" data-end=\"719\" \/>C. Chlorophyll-a<br data-start=\"735\" data-end=\"738\" \/>D. Anthocyanin<br data-start=\"752\" data-end=\"755\" \/><strong data-start=\"755\" data-end=\"768\">Answer: C<\/strong><\/p>\n<h3 data-start=\"770\" data-end=\"809\">5. Photosynthesis occurs mainly in:<\/h3>\n<p data-start=\"810\" data-end=\"869\">A. Roots<br data-start=\"818\" data-end=\"821\" \/>B. Stem<br data-start=\"828\" data-end=\"831\" \/>C. Flowers<br data-start=\"841\" data-end=\"844\" \/>D. Leaves<br data-start=\"853\" data-end=\"856\" \/><strong data-start=\"856\" data-end=\"869\">Answer: D<\/strong><\/p>\n<h3 data-start=\"871\" data-end=\"925\">6. The light reaction of photosynthesis occurs in:<\/h3>\n<p data-start=\"926\" data-end=\"1003\">A. Stroma<br data-start=\"935\" data-end=\"938\" \/>B. Thylakoid membrane<br data-start=\"959\" data-end=\"962\" \/>C. Cytoplasm<br data-start=\"974\" data-end=\"977\" \/>D. Nucleus<br data-start=\"987\" data-end=\"990\" \/><strong data-start=\"990\" data-end=\"1003\">Answer: B<\/strong><\/p>\n<h3 data-start=\"1005\" data-end=\"1065\">7. The dark reaction of photosynthesis is also known as:<\/h3>\n<p data-start=\"1066\" data-end=\"1160\">A. Krebs cycle<br data-start=\"1080\" data-end=\"1083\" \/>B. Calvin cycle<br data-start=\"1098\" data-end=\"1101\" \/>C. Glycolysis<br data-start=\"1114\" data-end=\"1117\" \/>D. Electron transport chain<br data-start=\"1144\" data-end=\"1147\" \/><strong data-start=\"1147\" data-end=\"1160\">Answer: B<\/strong><\/p>\n<h3 data-start=\"1162\" data-end=\"1213\">8. Which gas is released during photosynthesis?<\/h3>\n<p data-start=\"1214\" data-end=\"1287\">A. Carbon dioxide<br data-start=\"1231\" data-end=\"1234\" \/>B. Nitrogen<br data-start=\"1245\" data-end=\"1248\" \/>C. Oxygen<br data-start=\"1257\" data-end=\"1260\" \/>D. Hydrogen<br data-start=\"1271\" data-end=\"1274\" \/><strong data-start=\"1274\" data-end=\"1287\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1289\" data-end=\"1348\">9. The opening and closing of stomata is controlled by:<\/h3>\n<p data-start=\"1349\" data-end=\"1437\">A. Root hairs<br data-start=\"1362\" data-end=\"1365\" \/>B. Guard cells<br data-start=\"1379\" data-end=\"1382\" \/>C. Epidermal cells<br data-start=\"1400\" data-end=\"1403\" \/>D. Mesophyll cells<br data-start=\"1421\" data-end=\"1424\" \/><strong data-start=\"1424\" data-end=\"1437\">Answer: B<\/strong><\/p>\n<h3 data-start=\"1439\" data-end=\"1483\">10. Transpiration mainly occurs through:<\/h3>\n<p data-start=\"1484\" data-end=\"1549\">A. Lenticels<br data-start=\"1496\" data-end=\"1499\" \/>B. Cuticle<br data-start=\"1509\" data-end=\"1512\" \/>C. Stomata<br data-start=\"1522\" data-end=\"1525\" \/>D. Roots<br data-start=\"1533\" data-end=\"1536\" \/><strong data-start=\"1536\" data-end=\"1549\">Answer: C<\/strong><\/p>\n<hr data-start=\"1551\" data-end=\"1554\" \/>\n<h3 data-start=\"1556\" data-end=\"1607\">11. Which factor does NOT affect transpiration?<\/h3>\n<p data-start=\"1608\" data-end=\"1672\">A. Temperature<br data-start=\"1622\" data-end=\"1625\" \/>B. Light<br data-start=\"1633\" data-end=\"1636\" \/>C. Wind<br data-start=\"1643\" data-end=\"1646\" \/>D. Soil pH<br data-start=\"1656\" data-end=\"1659\" \/><strong data-start=\"1659\" data-end=\"1672\">Answer: D<\/strong><\/p>\n<h3 data-start=\"1674\" data-end=\"1731\">12. Water absorption in plants mainly occurs through:<\/h3>\n<p data-start=\"1732\" data-end=\"1796\">A. Leaves<br data-start=\"1741\" data-end=\"1744\" \/>B. Stem<br data-start=\"1751\" data-end=\"1754\" \/>C. Root hairs<br data-start=\"1767\" data-end=\"1770\" \/>D. Flowers<br data-start=\"1780\" data-end=\"1783\" \/><strong data-start=\"1783\" data-end=\"1796\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1798\" data-end=\"1855\">13. The upward movement of water in plants is called:<\/h3>\n<p data-start=\"1856\" data-end=\"1935\">A. Diffusion<br data-start=\"1868\" data-end=\"1871\" \/>B. Osmosis<br data-start=\"1881\" data-end=\"1884\" \/>C. Translocation<br data-start=\"1900\" data-end=\"1903\" \/>D. Ascent of sap<br data-start=\"1919\" data-end=\"1922\" \/><strong data-start=\"1922\" data-end=\"1935\">Answer: D<\/strong><\/p>\n<h3 data-start=\"1937\" data-end=\"1962\">14. Xylem transports:<\/h3>\n<p data-start=\"1963\" data-end=\"2035\">A. Food<br data-start=\"1970\" data-end=\"1973\" \/>B. Water and minerals<br data-start=\"1994\" data-end=\"1997\" \/>C. Hormones<br data-start=\"2008\" data-end=\"2011\" \/>D. Gases<br data-start=\"2019\" data-end=\"2022\" \/><strong data-start=\"2022\" data-end=\"2035\">Answer: B<\/strong><\/p>\n<h3 data-start=\"2037\" data-end=\"2063\">15. Phloem transports:<\/h3>\n<p data-start=\"2064\" data-end=\"2124\">A. Water<br data-start=\"2072\" data-end=\"2075\" \/>B. Minerals<br data-start=\"2086\" data-end=\"2089\" \/>C. Food<br data-start=\"2096\" data-end=\"2099\" \/>D. Oxygen<br data-start=\"2108\" data-end=\"2111\" \/><strong data-start=\"2111\" data-end=\"2124\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2126\" data-end=\"2175\">16. The movement of food in plants is called:<\/h3>\n<p data-start=\"2176\" data-end=\"2255\">A. Diffusion<br data-start=\"2188\" data-end=\"2191\" \/>B. Transpiration<br data-start=\"2207\" data-end=\"2210\" \/>C. Translocation<br data-start=\"2226\" data-end=\"2229\" \/>D. Osmosis<br data-start=\"2239\" data-end=\"2242\" \/><strong data-start=\"2242\" data-end=\"2255\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2257\" data-end=\"2303\">17. The pressure flow hypothesis explains:<\/h3>\n<p data-start=\"2304\" data-end=\"2402\">A. Water absorption<br data-start=\"2323\" data-end=\"2326\" \/>B. Transpiration<br data-start=\"2342\" data-end=\"2345\" \/>C. Food translocation<br data-start=\"2366\" data-end=\"2369\" \/>D. Photosynthesis<br data-start=\"2386\" data-end=\"2389\" \/><strong data-start=\"2389\" data-end=\"2402\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2404\" data-end=\"2444\">18. Respiration in plants occurs in:<\/h3>\n<p data-start=\"2445\" data-end=\"2520\">A. Chloroplast<br data-start=\"2459\" data-end=\"2462\" \/>B. Mitochondria<br data-start=\"2477\" data-end=\"2480\" \/>C. Ribosome<br data-start=\"2491\" data-end=\"2494\" \/>D. Vacuole<br data-start=\"2504\" data-end=\"2507\" \/><strong data-start=\"2507\" data-end=\"2520\">Answer: B<\/strong><\/p>\n<h3 data-start=\"2522\" data-end=\"2568\">19. Which gas is required for respiration?<\/h3>\n<p data-start=\"2569\" data-end=\"2642\">A. Carbon dioxide<br data-start=\"2586\" data-end=\"2589\" \/>B. Nitrogen<br data-start=\"2600\" data-end=\"2603\" \/>C. Oxygen<br data-start=\"2612\" data-end=\"2615\" \/>D. Hydrogen<br data-start=\"2626\" data-end=\"2629\" \/><strong data-start=\"2629\" data-end=\"2642\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2644\" data-end=\"2694\">20. The end product of aerobic respiration is:<\/h3>\n<p data-start=\"2695\" data-end=\"2780\">A. Glucose<br data-start=\"2705\" data-end=\"2708\" \/>B. Oxygen<br data-start=\"2717\" data-end=\"2720\" \/>C. Carbon dioxide and water<br data-start=\"2747\" data-end=\"2750\" \/>D. Lactic acid<br data-start=\"2764\" data-end=\"2767\" \/><strong data-start=\"2767\" data-end=\"2780\">Answer: C<\/strong><\/p>\n<hr data-start=\"2782\" data-end=\"2785\" \/>\n<h3 data-start=\"2787\" data-end=\"2836\">21. Anaerobic respiration in plants produces:<\/h3>\n<p data-start=\"2837\" data-end=\"2911\">A. Alcohol and CO\u2082<br data-start=\"2855\" data-end=\"2858\" \/>B. Lactic acid<br data-start=\"2872\" data-end=\"2875\" \/>C. Water<br data-start=\"2883\" data-end=\"2886\" \/>D. Oxygen<br data-start=\"2895\" data-end=\"2898\" \/><strong data-start=\"2898\" data-end=\"2911\">Answer: A<\/strong><\/p>\n<h3 data-start=\"2913\" data-end=\"2954\">22. Plant hormones are also known as:<\/h3>\n<p data-start=\"2955\" data-end=\"3028\">A. Vitamins<br data-start=\"2966\" data-end=\"2969\" \/>B. Enzymes<br data-start=\"2979\" data-end=\"2982\" \/>C. Phytohormones<br data-start=\"2998\" data-end=\"3001\" \/>D. Minerals<br data-start=\"3012\" data-end=\"3015\" \/><strong data-start=\"3015\" data-end=\"3028\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3030\" data-end=\"3077\">23. Which hormone promotes cell elongation?<\/h3>\n<p data-start=\"3078\" data-end=\"3150\">A. Cytokinin<br data-start=\"3090\" data-end=\"3093\" \/>B. Auxin<br data-start=\"3101\" data-end=\"3104\" \/>C. Ethylene<br data-start=\"3115\" data-end=\"3118\" \/>D. Abscisic acid<br data-start=\"3134\" data-end=\"3137\" \/><strong data-start=\"3137\" data-end=\"3150\">Answer: B<\/strong><\/p>\n<h3 data-start=\"3152\" data-end=\"3181\">24. Gibberellins promote:<\/h3>\n<p data-start=\"3182\" data-end=\"3265\">A. Leaf fall<br data-start=\"3194\" data-end=\"3197\" \/>B. Fruit ripening<br data-start=\"3214\" data-end=\"3217\" \/>C. Stem elongation<br data-start=\"3235\" data-end=\"3238\" \/>D. Dormancy<br data-start=\"3249\" data-end=\"3252\" \/><strong data-start=\"3252\" data-end=\"3265\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3267\" data-end=\"3309\">25. Cytokinins are mainly involved in:<\/h3>\n<p data-start=\"3310\" data-end=\"3396\">A. Root growth<br data-start=\"3324\" data-end=\"3327\" \/>B. Cell division<br data-start=\"3343\" data-end=\"3346\" \/>C. Leaf abscission<br data-start=\"3364\" data-end=\"3367\" \/>D. Senescence<br data-start=\"3380\" data-end=\"3383\" \/><strong data-start=\"3383\" data-end=\"3396\">Answer: B<\/strong><\/p>\n<h3 data-start=\"3398\" data-end=\"3434\">26. Ethylene is responsible for:<\/h3>\n<p data-start=\"3435\" data-end=\"3528\">A. Seed germination<br data-start=\"3454\" data-end=\"3457\" \/>B. Fruit ripening<br data-start=\"3474\" data-end=\"3477\" \/>C. Cell elongation<br data-start=\"3495\" data-end=\"3498\" \/>D. Root growth<br data-start=\"3512\" data-end=\"3515\" \/><strong data-start=\"3515\" data-end=\"3528\">Answer: B<\/strong><\/p>\n<h3 data-start=\"3530\" data-end=\"3561\">27. Abscisic acid promotes:<\/h3>\n<p data-start=\"3562\" data-end=\"3640\">A. Growth<br data-start=\"3571\" data-end=\"3574\" \/>B. Dormancy<br data-start=\"3585\" data-end=\"3588\" \/>C. Cell division<br data-start=\"3604\" data-end=\"3607\" \/>D. Fruit ripening<br data-start=\"3624\" data-end=\"3627\" \/><strong data-start=\"3627\" data-end=\"3640\">Answer: B<\/strong><\/p>\n<h3 data-start=\"3642\" data-end=\"3686\">28. Which hormone inhibits plant growth?<\/h3>\n<p data-start=\"3687\" data-end=\"3762\">A. Auxin<br data-start=\"3695\" data-end=\"3698\" \/>B. Gibberellin<br data-start=\"3712\" data-end=\"3715\" \/>C. Cytokinin<br data-start=\"3727\" data-end=\"3730\" \/>D. Abscisic acid<br data-start=\"3746\" data-end=\"3749\" \/><strong data-start=\"3749\" data-end=\"3762\">Answer: D<\/strong><\/p>\n<h3 data-start=\"3764\" data-end=\"3810\">29. Mineral nutrition in plants refers to:<\/h3>\n<p data-start=\"3811\" data-end=\"3907\">A. Photosynthesis<br data-start=\"3828\" data-end=\"3831\" \/>B. Water absorption<br data-start=\"3850\" data-end=\"3853\" \/>C. Uptake of minerals<br data-start=\"3874\" data-end=\"3877\" \/>D. Respiration<br data-start=\"3891\" data-end=\"3894\" \/><strong data-start=\"3894\" data-end=\"3907\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3909\" data-end=\"3950\">30. Which element is a macronutrient?<\/h3>\n<p data-start=\"3951\" data-end=\"4010\">A. Iron<br data-start=\"3958\" data-end=\"3961\" \/>B. Zinc<br data-start=\"3968\" data-end=\"3971\" \/>C. Nitrogen<br data-start=\"3982\" data-end=\"3985\" \/>D. Copper<br data-start=\"3994\" data-end=\"3997\" \/><strong data-start=\"3997\" data-end=\"4010\">Answer: C<\/strong><\/p>\n<hr data-start=\"4012\" data-end=\"4015\" \/>\n<h3 data-start=\"4017\" data-end=\"4058\">31. Which element is a micronutrient?<\/h3>\n<p data-start=\"4059\" data-end=\"4125\">A. Potassium<br data-start=\"4071\" data-end=\"4074\" \/>B. Calcium<br data-start=\"4084\" data-end=\"4087\" \/>C. Magnesium<br data-start=\"4099\" data-end=\"4102\" \/>D. Iron<br data-start=\"4109\" data-end=\"4112\" \/><strong data-start=\"4112\" data-end=\"4125\">Answer: D<\/strong><\/p>\n<h3 data-start=\"4127\" data-end=\"4162\">32. Nitrogen deficiency causes:<\/h3>\n<p data-start=\"4163\" data-end=\"4253\">A. Yellowing of leaves<br data-start=\"4185\" data-end=\"4188\" \/>B. Root decay<br data-start=\"4201\" data-end=\"4204\" \/>C. Excess growth<br data-start=\"4220\" data-end=\"4223\" \/>D. Thick stems<br data-start=\"4237\" data-end=\"4240\" \/><strong data-start=\"4240\" data-end=\"4253\">Answer: A<\/strong><\/p>\n<h3 data-start=\"4255\" data-end=\"4282\">33. Potassium helps in:<\/h3>\n<p data-start=\"4283\" data-end=\"4380\">A. Protein synthesis<br data-start=\"4303\" data-end=\"4306\" \/>B. Stomatal movement<br data-start=\"4326\" data-end=\"4329\" \/>C. Cell division<br data-start=\"4345\" data-end=\"4348\" \/>D. Seed dormancy<br data-start=\"4364\" data-end=\"4367\" \/><strong data-start=\"4367\" data-end=\"4380\">Answer: B<\/strong><\/p>\n<h3 data-start=\"4382\" data-end=\"4415\">34. Calcium is important for:<\/h3>\n<p data-start=\"4416\" data-end=\"4521\">A. Chlorophyll formation<br data-start=\"4440\" data-end=\"4443\" \/>B. Cell wall formation<br data-start=\"4465\" data-end=\"4468\" \/>C. Enzyme activity<br data-start=\"4486\" data-end=\"4489\" \/>D. Transpiration<br data-start=\"4505\" data-end=\"4508\" \/><strong data-start=\"4508\" data-end=\"4521\">Answer: B<\/strong><\/p>\n<h3 data-start=\"4523\" data-end=\"4559\">35. Magnesium is a component of:<\/h3>\n<p data-start=\"4560\" data-end=\"4623\">A. Cell wall<br data-start=\"4572\" data-end=\"4575\" \/>B. ATP<br data-start=\"4581\" data-end=\"4584\" \/>C. Chlorophyll<br data-start=\"4598\" data-end=\"4601\" \/>D. DNA<br data-start=\"4607\" data-end=\"4610\" \/><strong data-start=\"4610\" data-end=\"4623\">Answer: C<\/strong><\/p>\n<h3 data-start=\"4625\" data-end=\"4654\">36. Iron is required for:<\/h3>\n<p data-start=\"4655\" data-end=\"4755\">A. Chlorophyll synthesis<br data-start=\"4679\" data-end=\"4682\" \/>B. Respiration<br data-start=\"4696\" data-end=\"4699\" \/>C. Photosynthesis<br data-start=\"4716\" data-end=\"4719\" \/>D. Protein digestion<br data-start=\"4739\" data-end=\"4742\" \/><strong data-start=\"4742\" data-end=\"4755\">Answer: A<\/strong><\/p>\n<h3 data-start=\"4757\" data-end=\"4841\">37. Which process involves movement of molecules from high to low concentration?<\/h3>\n<p data-start=\"4842\" data-end=\"4924\">A. Osmosis<br data-start=\"4852\" data-end=\"4855\" \/>B. Diffusion<br data-start=\"4867\" data-end=\"4870\" \/>C. Active transport<br data-start=\"4889\" data-end=\"4892\" \/>D. Translocation<br data-start=\"4908\" data-end=\"4911\" \/><strong data-start=\"4911\" data-end=\"4924\">Answer: B<\/strong><\/p>\n<h3 data-start=\"4926\" data-end=\"4951\">38. Osmosis requires:<\/h3>\n<p data-start=\"4952\" data-end=\"5038\">A. Energy<br data-start=\"4961\" data-end=\"4964\" \/>B. Living cells<br data-start=\"4979\" data-end=\"4982\" \/>C. Semi-permeable membrane<br data-start=\"5008\" data-end=\"5011\" \/>D. Pressure<br data-start=\"5022\" data-end=\"5025\" \/><strong data-start=\"5025\" data-end=\"5038\">Answer: C<\/strong><\/p>\n<h3 data-start=\"5040\" data-end=\"5074\">39. Active transport requires:<\/h3>\n<p data-start=\"5075\" data-end=\"5161\">A. No energy<br data-start=\"5087\" data-end=\"5090\" \/>B. Energy<br data-start=\"5099\" data-end=\"5102\" \/>C. Passive movement<br data-start=\"5121\" data-end=\"5124\" \/>D. High concentration<br data-start=\"5145\" data-end=\"5148\" \/><strong data-start=\"5148\" data-end=\"5161\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5163\" data-end=\"5194\">40. Root pressure helps in:<\/h3>\n<p data-start=\"5195\" data-end=\"5287\">A. Food transport<br data-start=\"5212\" data-end=\"5215\" \/>B. Transpiration<br data-start=\"5231\" data-end=\"5234\" \/>C. Water movement<br data-start=\"5251\" data-end=\"5254\" \/>D. Photosynthesis<br data-start=\"5271\" data-end=\"5274\" \/><strong data-start=\"5274\" data-end=\"5287\">Answer: C<\/strong><\/p>\n<hr data-start=\"5289\" data-end=\"5292\" \/>\n<h3 data-start=\"5294\" data-end=\"5339\">41. Transpiration pull is created due to:<\/h3>\n<p data-start=\"5340\" data-end=\"5434\">A. Root pressure<br data-start=\"5356\" data-end=\"5359\" \/>B. Cohesion of water<br data-start=\"5379\" data-end=\"5382\" \/>C. Evaporation of water<br data-start=\"5405\" data-end=\"5408\" \/>D. Osmosis<br data-start=\"5418\" data-end=\"5421\" \/><strong data-start=\"5421\" data-end=\"5434\">Answer: C<\/strong><\/p>\n<h3 data-start=\"5436\" data-end=\"5482\">42. Cohesion refers to attraction between:<\/h3>\n<p data-start=\"5483\" data-end=\"5578\">A. Water and walls<br data-start=\"5501\" data-end=\"5504\" \/>B. Water molecules<br data-start=\"5522\" data-end=\"5525\" \/>C. Roots and soil<br data-start=\"5542\" data-end=\"5545\" \/>D. Leaves and air<br data-start=\"5562\" data-end=\"5565\" \/><strong data-start=\"5565\" data-end=\"5578\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5580\" data-end=\"5626\">43. Adhesion refers to attraction between:<\/h3>\n<p data-start=\"5627\" data-end=\"5734\">A. Water molecules<br data-start=\"5645\" data-end=\"5648\" \/>B. Water and vessel walls<br data-start=\"5673\" data-end=\"5676\" \/>C. Roots and leaves<br data-start=\"5695\" data-end=\"5698\" \/>D. Cells and tissues<br data-start=\"5718\" data-end=\"5721\" \/><strong data-start=\"5721\" data-end=\"5734\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5736\" data-end=\"5794\">44. The main carbohydrate formed in photosynthesis is:<\/h3>\n<p data-start=\"5795\" data-end=\"5861\">A. Sucrose<br data-start=\"5805\" data-end=\"5808\" \/>B. Starch<br data-start=\"5817\" data-end=\"5820\" \/>C. Cellulose<br data-start=\"5832\" data-end=\"5835\" \/>D. Glucose<br data-start=\"5845\" data-end=\"5848\" \/><strong data-start=\"5848\" data-end=\"5861\">Answer: D<\/strong><\/p>\n<h3 data-start=\"5863\" data-end=\"5891\">45. Starch is stored in:<\/h3>\n<p data-start=\"5892\" data-end=\"5972\">A. Roots and stems<br data-start=\"5910\" data-end=\"5913\" \/>B. Leaves only<br data-start=\"5927\" data-end=\"5930\" \/>C. Seeds only<br data-start=\"5943\" data-end=\"5946\" \/>D. Flowers<br data-start=\"5956\" data-end=\"5959\" \/><strong data-start=\"5959\" data-end=\"5972\">Answer: A<\/strong><\/p>\n<h3 data-start=\"5974\" data-end=\"6015\">46. Opening of stomata occurs due to:<\/h3>\n<p data-start=\"6016\" data-end=\"6110\">A. Loss of water<br data-start=\"6032\" data-end=\"6035\" \/>B. Increase in turgidity<br data-start=\"6059\" data-end=\"6062\" \/>C. Cell death<br data-start=\"6075\" data-end=\"6078\" \/>D. Root pressure<br data-start=\"6094\" data-end=\"6097\" \/><strong data-start=\"6097\" data-end=\"6110\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6112\" data-end=\"6153\">47. Closing of stomata occurs due to:<\/h3>\n<p data-start=\"6154\" data-end=\"6245\">A. Increased turgor<br data-start=\"6173\" data-end=\"6176\" \/>B. Loss of turgor<br data-start=\"6193\" data-end=\"6196\" \/>C. Cell division<br data-start=\"6212\" data-end=\"6215\" \/>D. Respiration<br data-start=\"6229\" data-end=\"6232\" \/><strong data-start=\"6232\" data-end=\"6245\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6247\" data-end=\"6282\">48. Photorespiration occurs in:<\/h3>\n<p data-start=\"6283\" data-end=\"6390\">A. Chloroplast only<br data-start=\"6302\" data-end=\"6305\" \/>B. Mitochondria only<br data-start=\"6325\" data-end=\"6328\" \/>C. Chloroplast and mitochondria<br data-start=\"6359\" data-end=\"6362\" \/>D. Cytoplasm<br data-start=\"6374\" data-end=\"6377\" \/><strong data-start=\"6377\" data-end=\"6390\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6392\" data-end=\"6445\">49. C4 plants differ from C3 plants because they:<\/h3>\n<p data-start=\"6446\" data-end=\"6551\">A. Lack chlorophyll<br data-start=\"6465\" data-end=\"6468\" \/>B. Have Kranz anatomy<br data-start=\"6489\" data-end=\"6492\" \/>C. Do not photosynthesize<br data-start=\"6517\" data-end=\"6520\" \/>D. Lack stomata<br data-start=\"6535\" data-end=\"6538\" \/><strong data-start=\"6538\" data-end=\"6551\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6553\" data-end=\"6592\">50. CAM plants open stomata during:<\/h3>\n<p data-start=\"6593\" data-end=\"6652\">A. Day<br data-start=\"6599\" data-end=\"6602\" \/>B. Night<br data-start=\"6610\" data-end=\"6613\" \/>C. Morning<br data-start=\"6623\" data-end=\"6626\" \/>D. Evening<br data-start=\"6636\" data-end=\"6639\" \/><strong data-start=\"6639\" data-end=\"6652\">Answer: B<\/strong><\/p>\n<hr data-start=\"6654\" data-end=\"6657\" \/>\n<p><a href=\"https:\/\/murreeroad.org\/human-physiology-mcqs-with-answers-100-multiple-choice-questions\/\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-4913 size-full\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/Human-Physiology-MCQs-with-Answers-\u2013-100-Multiple-Choice-Questions.png\" alt=\"Human Physiology MCQs with Answers \u2013 100 Multiple Choice Questions\" width=\"1000\" height=\"666\" srcset=\"https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Human-Physiology-MCQs-with-Answers-\u2013-100-Multiple-Choice-Questions.png 1000w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Human-Physiology-MCQs-with-Answers-\u2013-100-Multiple-Choice-Questions-300x200.png 300w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Human-Physiology-MCQs-with-Answers-\u2013-100-Multiple-Choice-Questions-768x511.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<hr data-start=\"6654\" data-end=\"6657\" \/>\n<h3 data-start=\"6659\" data-end=\"6690\">51. Transpiration helps in:<\/h3>\n<p data-start=\"6691\" data-end=\"6782\">A. Cooling of plant<br data-start=\"6710\" data-end=\"6713\" \/>B. Food synthesis<br data-start=\"6730\" data-end=\"6733\" \/>C. Cell division<br data-start=\"6749\" data-end=\"6752\" \/>D. Germination<br data-start=\"6766\" data-end=\"6769\" \/><strong data-start=\"6769\" data-end=\"6782\">Answer: A<\/strong><\/p>\n<h3 data-start=\"6784\" data-end=\"6826\">52. The unit of transpiration rate is:<\/h3>\n<p data-start=\"6827\" data-end=\"6892\">A. ml\/day<br data-start=\"6836\" data-end=\"6839\" \/>B. g\/m\u00b2\/hour<br data-start=\"6851\" data-end=\"6854\" \/>C. cm\/sec<br data-start=\"6863\" data-end=\"6866\" \/>D. mol\/sec<br data-start=\"6876\" data-end=\"6879\" \/><strong data-start=\"6879\" data-end=\"6892\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6894\" data-end=\"6930\">53. Which tissue conducts water?<\/h3>\n<p data-start=\"6931\" data-end=\"6992\">A. Phloem<br data-start=\"6940\" data-end=\"6943\" \/>B. Cambium<br data-start=\"6953\" data-end=\"6956\" \/>C. Xylem<br data-start=\"6964\" data-end=\"6967\" \/>D. Cortex<br data-start=\"6976\" data-end=\"6979\" \/><strong data-start=\"6979\" data-end=\"6992\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6994\" data-end=\"7029\">54. Which tissue conducts food?<\/h3>\n<p data-start=\"7030\" data-end=\"7089\">A. Xylem<br data-start=\"7038\" data-end=\"7041\" \/>B. Phloem<br data-start=\"7050\" data-end=\"7053\" \/>C. Cambium<br data-start=\"7063\" data-end=\"7066\" \/>D. Pith<br data-start=\"7073\" data-end=\"7076\" \/><strong data-start=\"7076\" data-end=\"7089\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7091\" data-end=\"7134\">55. The energy currency of the cell is:<\/h3>\n<p data-start=\"7135\" data-end=\"7184\">A. DNA<br data-start=\"7141\" data-end=\"7144\" \/>B. RNA<br data-start=\"7150\" data-end=\"7153\" \/>C. ATP<br data-start=\"7159\" data-end=\"7162\" \/>D. ADP<br data-start=\"7168\" data-end=\"7171\" \/><strong data-start=\"7171\" data-end=\"7184\">Answer: C<\/strong><\/p>\n<h3 data-start=\"7186\" data-end=\"7215\">56. Glycolysis occurs in:<\/h3>\n<p data-start=\"7216\" data-end=\"7292\">A. Mitochondria<br data-start=\"7231\" data-end=\"7234\" \/>B. Cytoplasm<br data-start=\"7246\" data-end=\"7249\" \/>C. Chloroplast<br data-start=\"7263\" data-end=\"7266\" \/>D. Nucleus<br data-start=\"7276\" data-end=\"7279\" \/><strong data-start=\"7279\" data-end=\"7292\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7294\" data-end=\"7324\">57. Krebs cycle occurs in:<\/h3>\n<p data-start=\"7325\" data-end=\"7401\">A. Cytoplasm<br data-start=\"7337\" data-end=\"7340\" \/>B. Chloroplast<br data-start=\"7354\" data-end=\"7357\" \/>C. Mitochondria<br data-start=\"7372\" data-end=\"7375\" \/>D. Nucleus<br data-start=\"7385\" data-end=\"7388\" \/><strong data-start=\"7388\" data-end=\"7401\">Answer: C<\/strong><\/p>\n<h3 data-start=\"7403\" data-end=\"7444\">58. The respiratory quotient (RQ) is:<\/h3>\n<p data-start=\"7445\" data-end=\"7561\">A. O\u2082 consumed \/ CO\u2082 released<br data-start=\"7474\" data-end=\"7477\" \/>B. CO\u2082 released \/ O\u2082 consumed<br data-start=\"7506\" data-end=\"7509\" \/>C. ATP produced<br data-start=\"7524\" data-end=\"7527\" \/>D. Energy released<br data-start=\"7545\" data-end=\"7548\" \/><strong data-start=\"7548\" data-end=\"7561\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7563\" data-end=\"7594\">59. RQ of carbohydrates is:<\/h3>\n<p data-start=\"7595\" data-end=\"7640\">A. 0.7<br data-start=\"7601\" data-end=\"7604\" \/>B. 1<br data-start=\"7608\" data-end=\"7611\" \/>C. 0.9<br data-start=\"7617\" data-end=\"7620\" \/>D. 2<br data-start=\"7624\" data-end=\"7627\" \/><strong data-start=\"7627\" data-end=\"7640\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7642\" data-end=\"7664\">60. RQ of fats is:<\/h3>\n<p data-start=\"7665\" data-end=\"7710\">A. 1<br data-start=\"7669\" data-end=\"7672\" \/>B. 0.7<br data-start=\"7678\" data-end=\"7681\" \/>C. 2<br data-start=\"7685\" data-end=\"7688\" \/>D. 0.9<br data-start=\"7694\" data-end=\"7697\" \/><strong data-start=\"7697\" data-end=\"7710\">Answer: B<\/strong><\/p>\n<hr data-start=\"7712\" data-end=\"7715\" \/>\n<h3 data-start=\"7717\" data-end=\"7763\">61. Which plant hormone delays senescence?<\/h3>\n<p data-start=\"7764\" data-end=\"7826\">A. Auxin<br data-start=\"7772\" data-end=\"7775\" \/>B. Ethylene<br data-start=\"7786\" data-end=\"7789\" \/>C. Cytokinin<br data-start=\"7801\" data-end=\"7804\" \/>D. ABA<br data-start=\"7810\" data-end=\"7813\" \/><strong data-start=\"7813\" data-end=\"7826\">Answer: C<\/strong><\/p>\n<h3 data-start=\"7828\" data-end=\"7864\">62. Vernalization is related to:<\/h3>\n<p data-start=\"7865\" data-end=\"7955\">A. Flowering<br data-start=\"7877\" data-end=\"7880\" \/>B. Seed germination<br data-start=\"7899\" data-end=\"7902\" \/>C. Fruit ripening<br data-start=\"7919\" data-end=\"7922\" \/>D. Photosynthesis<br data-start=\"7939\" data-end=\"7942\" \/><strong data-start=\"7942\" data-end=\"7955\">Answer: A<\/strong><\/p>\n<h3 data-start=\"7957\" data-end=\"7999\">63. Photoperiodism is the response to:<\/h3>\n<p data-start=\"8000\" data-end=\"8081\">A. Temperature<br data-start=\"8014\" data-end=\"8017\" \/>B. Light duration<br data-start=\"8034\" data-end=\"8037\" \/>C. Water<br data-start=\"8045\" data-end=\"8048\" \/>D. Soil nutrients<br data-start=\"8065\" data-end=\"8068\" \/><strong data-start=\"8068\" data-end=\"8081\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8083\" data-end=\"8119\">64. Long-day plants flower when:<\/h3>\n<p data-start=\"8120\" data-end=\"8218\">A. Nights are long<br data-start=\"8138\" data-end=\"8141\" \/>B. Days are short<br data-start=\"8158\" data-end=\"8161\" \/>C. Days are long<br data-start=\"8177\" data-end=\"8180\" \/>D. Temperature is high<br data-start=\"8202\" data-end=\"8205\" \/><strong data-start=\"8205\" data-end=\"8218\">Answer: C<\/strong><\/p>\n<h3 data-start=\"8220\" data-end=\"8257\">65. Short-day plants flower when:<\/h3>\n<p data-start=\"8258\" data-end=\"8360\">A. Days are long<br data-start=\"8274\" data-end=\"8277\" \/>B. Nights are long<br data-start=\"8295\" data-end=\"8298\" \/>C. Light is continuous<br data-start=\"8320\" data-end=\"8323\" \/>D. Temperature is low<br data-start=\"8344\" data-end=\"8347\" \/><strong data-start=\"8347\" data-end=\"8360\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8362\" data-end=\"8398\">66. Florigen is associated with:<\/h3>\n<p data-start=\"8399\" data-end=\"8477\">A. Leaf growth<br data-start=\"8413\" data-end=\"8416\" \/>B. Root growth<br data-start=\"8430\" data-end=\"8433\" \/>C. Flowering<br data-start=\"8445\" data-end=\"8448\" \/>D. Senescence<br data-start=\"8461\" data-end=\"8464\" \/><strong data-start=\"8464\" data-end=\"8477\">Answer: C<\/strong><\/p>\n<h3 data-start=\"8479\" data-end=\"8536\">67. Which element is essential for protein synthesis?<\/h3>\n<p data-start=\"8537\" data-end=\"8602\">A. Potassium<br data-start=\"8549\" data-end=\"8552\" \/>B. Nitrogen<br data-start=\"8563\" data-end=\"8566\" \/>C. Calcium<br data-start=\"8576\" data-end=\"8579\" \/>D. Iron<br data-start=\"8586\" data-end=\"8589\" \/><strong data-start=\"8589\" data-end=\"8602\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8604\" data-end=\"8637\">68. Boron deficiency affects:<\/h3>\n<p data-start=\"8638\" data-end=\"8728\">A. Photosynthesis<br data-start=\"8655\" data-end=\"8658\" \/>B. Cell wall formation<br data-start=\"8680\" data-end=\"8683\" \/>C. Root growth<br data-start=\"8697\" data-end=\"8700\" \/>D. Flowering<br data-start=\"8712\" data-end=\"8715\" \/><strong data-start=\"8715\" data-end=\"8728\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8730\" data-end=\"8769\">69. The main function of leaves is:<\/h3>\n<p data-start=\"8770\" data-end=\"8845\">A. Support<br data-start=\"8780\" data-end=\"8783\" \/>B. Storage<br data-start=\"8793\" data-end=\"8796\" \/>C. Photosynthesis<br data-start=\"8813\" data-end=\"8816\" \/>D. Absorption<br data-start=\"8829\" data-end=\"8832\" \/><strong data-start=\"8832\" data-end=\"8845\">Answer: C<\/strong><\/p>\n<h3 data-start=\"8847\" data-end=\"8897\">70. The site of gaseous exchange in plants is:<\/h3>\n<p data-start=\"8898\" data-end=\"8957\">A. Roots<br data-start=\"8906\" data-end=\"8909\" \/>B. Stem<br data-start=\"8916\" data-end=\"8919\" \/>C. Leaves<br data-start=\"8928\" data-end=\"8931\" \/>D. Flowers<br data-start=\"8941\" data-end=\"8944\" \/><strong data-start=\"8944\" data-end=\"8957\">Answer: C<\/strong><\/p>\n<hr data-start=\"8959\" data-end=\"8962\" \/>\n<h3 data-start=\"8964\" data-end=\"9019\">71. The main source of oxygen in photosynthesis is:<\/h3>\n<p data-start=\"9020\" data-end=\"9075\">A. CO\u2082<br data-start=\"9026\" data-end=\"9029\" \/>B. Water<br data-start=\"9037\" data-end=\"9040\" \/>C. Glucose<br data-start=\"9050\" data-end=\"9053\" \/>D. Air<br data-start=\"9059\" data-end=\"9062\" \/><strong data-start=\"9062\" data-end=\"9075\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9077\" data-end=\"9133\">72. Which factor affects the rate of photosynthesis?<\/h3>\n<p data-start=\"9134\" data-end=\"9226\">A. Light intensity<br data-start=\"9152\" data-end=\"9155\" \/>B. CO\u2082 concentration<br data-start=\"9175\" data-end=\"9178\" \/>C. Temperature<br data-start=\"9192\" data-end=\"9195\" \/>D. All of these<br data-start=\"9210\" data-end=\"9213\" \/><strong data-start=\"9213\" data-end=\"9226\">Answer: D<\/strong><\/p>\n<h3 data-start=\"9228\" data-end=\"9276\">73. Law of limiting factors was proposed by:<\/h3>\n<p data-start=\"9277\" data-end=\"9343\">A. Darwin<br data-start=\"9286\" data-end=\"9289\" \/>B. Blackman<br data-start=\"9300\" data-end=\"9303\" \/>C. Mendel<br data-start=\"9312\" data-end=\"9315\" \/>D. Priestley<br data-start=\"9327\" data-end=\"9330\" \/><strong data-start=\"9330\" data-end=\"9343\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9345\" data-end=\"9395\">74. Which scientist discovered photosynthesis?<\/h3>\n<p data-start=\"9396\" data-end=\"9460\">A. Darwin<br data-start=\"9405\" data-end=\"9408\" \/>B. Priestley<br data-start=\"9420\" data-end=\"9423\" \/>C. Mendel<br data-start=\"9432\" data-end=\"9435\" \/>D. Watson<br data-start=\"9444\" data-end=\"9447\" \/><strong data-start=\"9447\" data-end=\"9460\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9462\" data-end=\"9524\">75. The end product of photosynthesis stored in plants is:<\/h3>\n<p data-start=\"9525\" data-end=\"9591\">A. Glucose<br data-start=\"9535\" data-end=\"9538\" \/>B. Starch<br data-start=\"9547\" data-end=\"9550\" \/>C. Sucrose<br data-start=\"9560\" data-end=\"9563\" \/>D. Cellulose<br data-start=\"9575\" data-end=\"9578\" \/><strong data-start=\"9578\" data-end=\"9591\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9593\" data-end=\"9634\">76. Which pigment absorbs blue light?<\/h3>\n<p data-start=\"9635\" data-end=\"9718\">A. Chlorophyll-a<br data-start=\"9651\" data-end=\"9654\" \/>B. Chlorophyll-b<br data-start=\"9670\" data-end=\"9673\" \/>C. Carotene<br data-start=\"9684\" data-end=\"9687\" \/>D. All of these<br data-start=\"9702\" data-end=\"9705\" \/><strong data-start=\"9705\" data-end=\"9718\">Answer: D<\/strong><\/p>\n<h3 data-start=\"9720\" data-end=\"9765\">77. Which plant movement is growth-based?<\/h3>\n<p data-start=\"9766\" data-end=\"9853\">A. Nastic<br data-start=\"9775\" data-end=\"9778\" \/>B. Turgor movement<br data-start=\"9796\" data-end=\"9799\" \/>C. Tropic movement<br data-start=\"9817\" data-end=\"9820\" \/>D. Sleep movement<br data-start=\"9837\" data-end=\"9840\" \/><strong data-start=\"9840\" data-end=\"9853\">Answer: C<\/strong><\/p>\n<h3 data-start=\"9855\" data-end=\"9903\">78. Phototropism is movement in response to:<\/h3>\n<p data-start=\"9904\" data-end=\"9963\">A. Gravity<br data-start=\"9914\" data-end=\"9917\" \/>B. Water<br data-start=\"9925\" data-end=\"9928\" \/>C. Light<br data-start=\"9936\" data-end=\"9939\" \/>D. Touch<br data-start=\"9947\" data-end=\"9950\" \/><strong data-start=\"9950\" data-end=\"9963\">Answer: C<\/strong><\/p>\n<h3 data-start=\"9965\" data-end=\"10011\">79. Geotropism is movement in response to:<\/h3>\n<p data-start=\"10012\" data-end=\"10070\">A. Light<br data-start=\"10020\" data-end=\"10023\" \/>B. Gravity<br data-start=\"10033\" data-end=\"10036\" \/>C. Water<br data-start=\"10044\" data-end=\"10047\" \/>D. Heat<br data-start=\"10054\" data-end=\"10057\" \/><strong data-start=\"10057\" data-end=\"10070\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10072\" data-end=\"10120\">80. Hydrotropism is movement in response to:<\/h3>\n<p data-start=\"10121\" data-end=\"10186\">A. Light<br data-start=\"10129\" data-end=\"10132\" \/>B. Water<br data-start=\"10140\" data-end=\"10143\" \/>C. Gravity<br data-start=\"10153\" data-end=\"10156\" \/>D. Temperature<br data-start=\"10170\" data-end=\"10173\" \/><strong data-start=\"10173\" data-end=\"10186\">Answer: B<\/strong><\/p>\n<hr data-start=\"10188\" data-end=\"10191\" \/>\n<h3 data-start=\"10193\" data-end=\"10242\">81. Thigmotropism is movement in response to:<\/h3>\n<p data-start=\"10243\" data-end=\"10302\">A. Light<br data-start=\"10251\" data-end=\"10254\" \/>B. Touch<br data-start=\"10262\" data-end=\"10265\" \/>C. Water<br data-start=\"10273\" data-end=\"10276\" \/>D. Gravity<br data-start=\"10286\" data-end=\"10289\" \/><strong data-start=\"10289\" data-end=\"10302\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10304\" data-end=\"10363\">82. The opening of flowers in morning is an example of:<\/h3>\n<p data-start=\"10364\" data-end=\"10461\">A. Tropic movement<br data-start=\"10382\" data-end=\"10385\" \/>B. Nastic movement<br data-start=\"10403\" data-end=\"10406\" \/>C. Growth movement<br data-start=\"10424\" data-end=\"10427\" \/>D. Turgor movement<br data-start=\"10445\" data-end=\"10448\" \/><strong data-start=\"10448\" data-end=\"10461\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10463\" data-end=\"10510\">83. The loss of water from aerial parts is:<\/h3>\n<p data-start=\"10511\" data-end=\"10595\">A. Respiration<br data-start=\"10525\" data-end=\"10528\" \/>B. Transpiration<br data-start=\"10544\" data-end=\"10547\" \/>C. Absorption<br data-start=\"10560\" data-end=\"10563\" \/>D. Translocation<br data-start=\"10579\" data-end=\"10582\" \/><strong data-start=\"10582\" data-end=\"10595\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10597\" data-end=\"10644\">84. Cuticular transpiration occurs through:<\/h3>\n<p data-start=\"10645\" data-end=\"10710\">A. Stomata<br data-start=\"10655\" data-end=\"10658\" \/>B. Lenticels<br data-start=\"10670\" data-end=\"10673\" \/>C. Cuticle<br data-start=\"10683\" data-end=\"10686\" \/>D. Roots<br data-start=\"10694\" data-end=\"10697\" \/><strong data-start=\"10697\" data-end=\"10710\">Answer: C<\/strong><\/p>\n<h3 data-start=\"10712\" data-end=\"10755\">85. Lenticular transpiration occurs in:<\/h3>\n<p data-start=\"10756\" data-end=\"10822\">A. Leaves<br data-start=\"10765\" data-end=\"10768\" \/>B. Roots<br data-start=\"10776\" data-end=\"10779\" \/>C. Woody stems<br data-start=\"10793\" data-end=\"10796\" \/>D. Flowers<br data-start=\"10806\" data-end=\"10809\" \/><strong data-start=\"10809\" data-end=\"10822\">Answer: C<\/strong><\/p>\n<h3 data-start=\"10824\" data-end=\"10867\">86. The main force for water ascent is:<\/h3>\n<p data-start=\"10868\" data-end=\"10954\">A. Root pressure<br data-start=\"10884\" data-end=\"10887\" \/>B. Capillarity<br data-start=\"10901\" data-end=\"10904\" \/>C. Transpiration pull<br data-start=\"10925\" data-end=\"10928\" \/>D. Osmosis<br data-start=\"10938\" data-end=\"10941\" \/><strong data-start=\"10941\" data-end=\"10954\">Answer: C<\/strong><\/p>\n<h3 data-start=\"10956\" data-end=\"10994\">87. Water potential is denoted by:<\/h3>\n<p data-start=\"10995\" data-end=\"11040\">A. \u03a8w<br data-start=\"11000\" data-end=\"11003\" \/>B. \u03a8s<br data-start=\"11008\" data-end=\"11011\" \/>C. \u03a8p<br data-start=\"11016\" data-end=\"11019\" \/>D. \u03a8g<br data-start=\"11024\" data-end=\"11027\" \/><strong data-start=\"11027\" data-end=\"11040\">Answer: A<\/strong><\/p>\n<h3 data-start=\"11042\" data-end=\"11077\">88. Solute potential is always:<\/h3>\n<p data-start=\"11078\" data-end=\"11142\">A. Positive<br data-start=\"11089\" data-end=\"11092\" \/>B. Zero<br data-start=\"11099\" data-end=\"11102\" \/>C. Negative<br data-start=\"11113\" data-end=\"11116\" \/>D. Neutral<br data-start=\"11126\" data-end=\"11129\" \/><strong data-start=\"11129\" data-end=\"11142\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11144\" data-end=\"11182\">89. Pressure potential is usually:<\/h3>\n<p data-start=\"11183\" data-end=\"11247\">A. Negative<br data-start=\"11194\" data-end=\"11197\" \/>B. Positive<br data-start=\"11208\" data-end=\"11211\" \/>C. Zero<br data-start=\"11218\" data-end=\"11221\" \/>D. Neutral<br data-start=\"11231\" data-end=\"11234\" \/><strong data-start=\"11234\" data-end=\"11247\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11249\" data-end=\"11298\">90. The movement of ions against gradient is:<\/h3>\n<p data-start=\"11299\" data-end=\"11385\">A. Diffusion<br data-start=\"11311\" data-end=\"11314\" \/>B. Osmosis<br data-start=\"11324\" data-end=\"11327\" \/>C. Active transport<br data-start=\"11346\" data-end=\"11349\" \/>D. Passive transport<br data-start=\"11369\" data-end=\"11372\" \/><strong data-start=\"11372\" data-end=\"11385\">Answer: C<\/strong><\/p>\n<hr data-start=\"11387\" data-end=\"11390\" \/>\n<h3 data-start=\"11392\" data-end=\"11432\">91. Which mineral activates enzymes?<\/h3>\n<p data-start=\"11433\" data-end=\"11504\">A. Potassium<br data-start=\"11445\" data-end=\"11448\" \/>B. Nitrogen<br data-start=\"11459\" data-end=\"11462\" \/>C. Phosphorus<br data-start=\"11475\" data-end=\"11478\" \/>D. Calcium<br data-start=\"11488\" data-end=\"11491\" \/><strong data-start=\"11491\" data-end=\"11504\">Answer: A<\/strong><\/p>\n<h3 data-start=\"11506\" data-end=\"11542\">92. Phosphorus is important for:<\/h3>\n<p data-start=\"11543\" data-end=\"11630\">A. ATP formation<br data-start=\"11559\" data-end=\"11562\" \/>B. Cell wall<br data-start=\"11574\" data-end=\"11577\" \/>C. Chlorophyll<br data-start=\"11591\" data-end=\"11594\" \/>D. Enzyme inhibition<br data-start=\"11614\" data-end=\"11617\" \/><strong data-start=\"11617\" data-end=\"11630\">Answer: A<\/strong><\/p>\n<h3 data-start=\"11632\" data-end=\"11665\">93. Sulfur is a component of:<\/h3>\n<p data-start=\"11666\" data-end=\"11738\">A. Carbohydrates<br data-start=\"11682\" data-end=\"11685\" \/>B. Proteins<br data-start=\"11696\" data-end=\"11699\" \/>C. Lipids<br data-start=\"11708\" data-end=\"11711\" \/>D. Vitamins<br data-start=\"11722\" data-end=\"11725\" \/><strong data-start=\"11725\" data-end=\"11738\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11740\" data-end=\"11796\">94. Which nutrient deficiency causes poor flowering?<\/h3>\n<p data-start=\"11797\" data-end=\"11865\">A. Nitrogen<br data-start=\"11808\" data-end=\"11811\" \/>B. Phosphorus<br data-start=\"11824\" data-end=\"11827\" \/>C. Potassium<br data-start=\"11839\" data-end=\"11842\" \/>D. Iron<br data-start=\"11849\" data-end=\"11852\" \/><strong data-start=\"11852\" data-end=\"11865\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11867\" data-end=\"11895\">95. Chlorosis refers to:<\/h3>\n<p data-start=\"11896\" data-end=\"11981\">A. Leaf fall<br data-start=\"11908\" data-end=\"11911\" \/>B. Yellowing of leaves<br data-start=\"11933\" data-end=\"11936\" \/>C. Root decay<br data-start=\"11949\" data-end=\"11952\" \/>D. Cell death<br data-start=\"11965\" data-end=\"11968\" \/><strong data-start=\"11968\" data-end=\"11981\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11983\" data-end=\"12010\">96. Necrosis refers to:<\/h3>\n<p data-start=\"12011\" data-end=\"12103\">A. Leaf yellowing<br data-start=\"12028\" data-end=\"12031\" \/>B. Cell death<br data-start=\"12044\" data-end=\"12047\" \/>C. Cell elongation<br data-start=\"12065\" data-end=\"12068\" \/>D. Growth promotion<br data-start=\"12087\" data-end=\"12090\" \/><strong data-start=\"12090\" data-end=\"12103\">Answer: B<\/strong><\/p>\n<h3 data-start=\"12105\" data-end=\"12153\">97. The first stable product of C3 cycle is:<\/h3>\n<p data-start=\"12154\" data-end=\"12204\">A. PEP<br data-start=\"12160\" data-end=\"12163\" \/>B. RuBP<br data-start=\"12170\" data-end=\"12173\" \/>C. PGA<br data-start=\"12179\" data-end=\"12182\" \/>D. OAA<br data-start=\"12188\" data-end=\"12191\" \/><strong data-start=\"12191\" data-end=\"12204\">Answer: C<\/strong><\/p>\n<h3 data-start=\"12206\" data-end=\"12254\">98. The first stable product of C4 cycle is:<\/h3>\n<p data-start=\"12255\" data-end=\"12309\">A. PGA<br data-start=\"12261\" data-end=\"12264\" \/>B. RuBP<br data-start=\"12271\" data-end=\"12274\" \/>C. OAA<br data-start=\"12280\" data-end=\"12283\" \/>D. Glucose<br data-start=\"12293\" data-end=\"12296\" \/><strong data-start=\"12296\" data-end=\"12309\">Answer: C<\/strong><\/p>\n<h3 data-start=\"12311\" data-end=\"12349\">99. RuBisCO enzyme is involved in:<\/h3>\n<p data-start=\"12350\" data-end=\"12439\">A. Respiration<br data-start=\"12364\" data-end=\"12367\" \/>B. Transpiration<br data-start=\"12383\" data-end=\"12386\" \/>C. Carbon fixation<br data-start=\"12404\" data-end=\"12407\" \/>D. Translocation<br data-start=\"12423\" data-end=\"12426\" \/><strong data-start=\"12426\" data-end=\"12439\">Answer: C<\/strong><\/p>\n<h3 data-start=\"12441\" data-end=\"12487\">100. Plant physiology helps us understand:<\/h3>\n<p data-start=\"12488\" data-end=\"12593\">A. Plant classification<br data-start=\"12511\" data-end=\"12514\" \/>B. Plant evolution<br data-start=\"12532\" data-end=\"12535\" \/>C. Plant life processes<br data-start=\"12558\" data-end=\"12561\" \/>D. Plant fossils<br data-start=\"12577\" data-end=\"12580\" \/><strong data-start=\"12580\" data-end=\"12593\">Answer: C<\/strong><\/p>\n<p data-start=\"12488\" data-end=\"12593\"><a href=\"https:\/\/rgsoftwares.com\/school-management-software\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4896\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/School-Management-software-1.png\" alt=\"\" width=\"1500\" height=\"98\" srcset=\"https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1.png 1500w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-300x20.png 300w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-1024x67.png 1024w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-768x50.png 768w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice 100 Plant Physiology MCQs with answers covering photosynthesis, respiration, transpiration, mineral nutrition, plant hormones, and water transport\u2014ideal for students and exams. Plant Physiology is a core branch of biology that explores how plants function, grow, and respond to their environment. Understanding key processes such as photosynthesis, respiration, transpiration, mineral nutrition, water transport, and the &#8230; <a title=\"Plant Physiology MCQs with Answers \u2013 100 Multiple Choice Questions\" class=\"read-more\" href=\"https:\/\/learn-nest.murreeroad.org\/blog\/plant-physiology-mcqs-with-answers-100-multiple-choice-questions\/\" aria-label=\"Read more about Plant Physiology MCQs with Answers \u2013 100 Multiple Choice Questions\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":4916,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowprK_DA:productID":"","om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2106],"tags":[2774,2764,2715,2702,2626,2768,2772,2765,2773,2767,2770,2771,2762,2763,2769,2775,2766],"class_list":["post-4915","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mcqs","tag-abscisic-acid-promotes","tag-biology-mcqs-plant-physiology","tag-competitive-exam-biology","tag-general-science-mcqs","tag-mcqs-with-answers","tag-mineral-nutrition-in-plants","tag-phloem-transports","tag-photosynthesis-mcqs","tag-plant-hormones","tag-plant-hormones-mcqs","tag-plant-physiology","tag-plant-physiology-is-the-study-of","tag-plant-physiology-mcqs","tag-plant-physiology-questions-with-answers","tag-plant-respiration-mcqs","tag-the-unit-of-transpiration","tag-transpiration-questions"],"aioseo_notices":[],"uagb_featured_image_src":{"full":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology.jpg",1280,720,false],"thumbnail":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-150x150.jpg",150,150,true],"medium":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-300x169.jpg",300,169,true],"medium_large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-768x432.jpg",768,432,true],"large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-1024x576.jpg",1024,576,true],"1536x1536":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology.jpg",1280,720,false],"2048x2048":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology.jpg",1280,720,false]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/learn-nest.murreeroad.org\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Practice 100 Plant Physiology MCQs with answers covering photosynthesis, respiration, transpiration, mineral nutrition, plant hormones, and water transport\u2014ideal for students and exams. Plant Physiology is a core branch of biology that explores how plants function, grow, and respond to their environment. Understanding key processes such as photosynthesis, respiration, transpiration, mineral nutrition, water transport, and the&hellip;","_links":{"self":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/comments?post=4915"}],"version-history":[{"count":1,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4915\/revisions"}],"predecessor-version":[{"id":4917,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4915\/revisions\/4917"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media\/4916"}],"wp:attachment":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media?parent=4915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/categories?post=4915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/tags?post=4915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}