This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 11 Transport In Plants – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 11 Transport In Plants Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which part of the plant is primarily involved in gas exchange? A) Roots. B) Leaves. C) Stem. D) Flowers. Show Answer Correct Answer: B) Leaves. 2. In a food chain, at what point does photosynthesis take place? A) Primary consumer. B) Secondary consumer. C) Tertiary consumer. D) Producer/green plant. Show Answer Correct Answer: D) Producer/green plant. 3. Which one of the following will not directly affect transpiration? A) Temperature. B) Light. C) Wind speed. D) Chlorophyll content of leaves. Show Answer Correct Answer: D) Chlorophyll content of leaves. 4. What drives the movement of fluid through phloem tissue in a plant? A) Gravity. B) Transpiration pull. C) Pressure flow mechanism. D) Capillary action. Show Answer Correct Answer: C) Pressure flow mechanism. 5. Why does water move upward through unlignified sections of xylem vessel walls during leaf hydration? A) Active pumping by companion cells. B) High solute potential in epidermis. C) Pressure from phloem translocation. D) Lower resistance at unlignified pits. Show Answer Correct Answer: D) Lower resistance at unlignified pits. 6. How is water transported from stems to leaves? A) Xylem. B) Phloem. C) Stems. D) Roots. Show Answer Correct Answer: A) Xylem. 7. Which of the following protect the body against pathogenic microorganisms such as bacteria, protozoa, viruses and their secretions? A) Leucocytes. B) Erythrocytes. C) Thromboplastin. D) Platelets. Show Answer Correct Answer: A) Leucocytes. 8. The region of stem between two nodes is the A) Lateral bud. B) Shoot system. C) Node. D) Internode. Show Answer Correct Answer: D) Internode. 9. The movement of sugars in the phloem contributes to homeostasis in a plant by: A) Distributing energy to all parts of the plant. B) Absorbing water from the soil. C) Releasing oxygen into the air. D) Providing structural support. Show Answer Correct Answer: A) Distributing energy to all parts of the plant. 10. Cooling effect of excessive evaporation A) Helps cool the leaf by absorbing latent heat as water evaporates, preventing cytoplasm damage from high temperatures. B) Increases the temperature of the leaf, promoting faster photosynthesis. C) Reduces water loss, leading to higher temperatures in the leaf. D) Causes the leaf to wilt due to excessive moisture loss. Show Answer Correct Answer: A) Helps cool the leaf by absorbing latent heat as water evaporates, preventing cytoplasm damage from high temperatures. 11. Which apparatus is needed to measure the rates of transpiration? A) Pipette. B) Potometer. C) Bunsen burner. D) Plants. Show Answer Correct Answer: B) Potometer. 12. How does water get from the leaf to the atmosphere? A) It moves by osmosis into the air spaces and diffuses through the stomata. B) It diffuses into the air spaces and evaporates through the stomata. C) It evaporates into the air spaces and diffuses through the stomata. D) It moves by active transport into the air spaces and evaporates through the stomata. Show Answer Correct Answer: C) It evaporates into the air spaces and diffuses through the stomata. 13. When sugars are actively transported into a cell, what happens to T.P. inside that cell as a result- A) No change; sugar conc. has no effect on T.P. B) Increases because sugar conc. directly affects T.P. C) Decreases, because water exits & affect T.P. D) Increases, because water enters & affects T.P. Show Answer Correct Answer: D) Increases, because water enters & affects T.P. 14. Phloem is living due to the presence of companion cells. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 15. Lily is studying the functions of different plant tissues in her biology class. She learns that one type of tissue is responsible for transporting essential substances throughout the plant. What does phloem transport? A) Nutrients and waste. B) Water and minerals. C) Oxygen and carbon dioxide. D) Sucrose and amino acids. Show Answer Correct Answer: D) Sucrose and amino acids. 16. Active transport is important because it can move molecules- A) From their high concentration to a lower concentration. B) From their low concentration to a higher concentration. C) With less ATP than might otherwise be used to move molecules. D) By increasing their diffusion coefficient. Show Answer Correct Answer: B) From their low concentration to a higher concentration. 17. True or False:When Abigail waters her plants, the phloem transport in the plants always occurs in the same direction. A) Only in spring. B) Only in summer. C) False. D) True. Show Answer Correct Answer: C) False. 18. Water will move from its region of high chemical potential / concentration to its region of lower chemical potential until A) Equilibrium is reached / DPD of both regions becomes same. B) Water amount in both regions becomes equal. C) Solute amount in both regions become equal. D) Amount of both solvent and solutes in both regions become equal. Show Answer Correct Answer: A) Equilibrium is reached / DPD of both regions becomes same. 19. Osmosis occurs in A) Semi permeable membrane. B) Freely permeable membrane. C) Non of he above. D) Both. Show Answer Correct Answer: A) Semi permeable membrane. 20. Cells which transport assimilates in the plant are called ..... ? A) Inorganic. B) Sieve elements. C) Key elements. D) Phloem elements. Show Answer Correct Answer: B) Sieve elements. 21. Translocation may occur as the mass flow hypothesis. The pressure involved in this hypothesis originates from A) The root pressure. B) Transpiration in the leaves. C) Accumulation of minerals and water in leaves. D) The intake of water by sieve tubes in the leaves. Show Answer Correct Answer: D) The intake of water by sieve tubes in the leaves. 22. Movement of sugar from source to other parts of plant is assist by A) Active transport. B) Diffusion. C) Endosmosis. D) Capillary action. Show Answer Correct Answer: A) Active transport. 23. What drives the flow of water through the xylem? A) Passive transport by the endodermis. B) The number of companion cells in the phloem. C) The evaporation of water from the leaves. D) Active transport by sieve-tube elements. Show Answer Correct Answer: C) The evaporation of water from the leaves. 24. What is the role of cohesion in water movement in plants? A) Cohesion helps in the attraction between water molecules, aiding in the upward movement of water in the xylem. B) Cohesion prevents water from evaporating from the leaves, ensuring water retention. C) Cohesion allows water to be absorbed by the roots more efficiently. D) Cohesion is responsible for the color of the leaves during photosynthesis. Show Answer Correct Answer: A) Cohesion helps in the attraction between water molecules, aiding in the upward movement of water in the xylem. 25. Phloem is responsible A) For downward translocation of organic nutrients to root cell. B) For upward translocation of minerals to stem tip. C) For providing support to the plant part. D) For providing water to the neighbouring cells. Show Answer Correct Answer: A) For downward translocation of organic nutrients to root cell. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 11 Transport In Plants Quiz 1Class 11 Biology Chapter 11 Transport In Plants Quiz 2Class 11 Biology Chapter 11 Transport In Plants Quiz 3Class 11 Biology Chapter 11 Transport In Plants Quiz 4Class 11 Biology Chapter 11 Transport In Plants Quiz 5Class 11 Biology Chapter 11 Transport In Plants Quiz 6Class 11 Biology Chapter 11 Transport In Plants Quiz 7Class 11 Biology Chapter 11 Transport In Plants Quiz 8Class 11 Biology Chapter 11 Transport In Plants Quiz 9Class 11 Biology Chapter 11 Transport In Plants Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books