This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 11 Transport In Plants – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 11 Transport In Plants Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the term used to describe the movement of water from the roots to the leaves of a plant? A) Transpiration. B) Evaporation. C) Translocation. D) Active transport. Show Answer Correct Answer: A) Transpiration. 2. What is the role of companion cells in phloem tissue? A) They help in the transport of water. B) They assist in the transport of sugars and organic compounds. C) They provide structural support to the plant. D) They produce oxygen for the plant. Show Answer Correct Answer: B) They assist in the transport of sugars and organic compounds. 3. What is the definition of diffusion? A) The movement of molecules from a lower concentration to a higher concentration. B) The movement of molecules from a higher concentration to a lower concentration. C) The movement of water molecules from a dilute solution to a concentrated solution. D) The movement of only solid molecules from a lower concentration to a higher concentration. Show Answer Correct Answer: B) The movement of molecules from a higher concentration to a lower concentration. 4. Process in which food substances are moved to the rest of plant by phloem is known as A) Respiration. B) Transpiration. C) Translocation. D) Photosynthesis. Show Answer Correct Answer: C) Translocation. 5. What process allows mineral ions to move from the soil into the roots of plants? A) Osmosis. B) Diffusion. C) Active transport. D) Facilitated diffusion. Show Answer Correct Answer: C) Active transport. 6. An increase in wind or temperature will ..... transpiration A) Increase. B) Stop. C) Decrease. D) Not affect. Show Answer Correct Answer: A) Increase. 7. Water moves from one Tracheid to another through A) Perforations. B) Pit membrane. C) Sieve plate. D) None of the above. Show Answer Correct Answer: B) Pit membrane. 8. Lignin helps to prevent the ..... of the xylem vessels as a result of ..... tension within the xylem, and this tension that is caused by the ..... exerted on water molecules within the xylem A) Collapse, high, root pressure. B) Collapse, high, transpiration pull. C) Rupture, high, transpiration pull. D) Bending, high, root pressure. Show Answer Correct Answer: B) Collapse, high, transpiration pull. 9. What is the role of tracheids and vessel elements in plants? A) Food storage. B) Protection. C) Water conduction. D) Photosynthesis. Show Answer Correct Answer: C) Water conduction. 10. Which variable is the one that is changed by the experimenter in the potometer experiment? A) Humidity. B) Light intensity. C) Wind speed. D) Temperature. Show Answer Correct Answer: B) Light intensity. 11. What is the role of lignin in xylem vessels? A) To provide flexibility. B) To conduct photosynthesis. C) To provide structural support and impermeability to water. D) To store nutrients. Show Answer Correct Answer: C) To provide structural support and impermeability to water. 12. How do guard cells help control the rate of transpiration? A) By absorbing water from the soil. B) By opening and closing the stomata. C) By transporting water to the roots. D) By producing chlorophyll. Show Answer Correct Answer: B) By opening and closing the stomata. 13. The Casparian strip prevents water movement through the apoplastic pathway. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 14. Which statement best describes lignin in xylem vessel walls? A) Elastic, protein matrix storing nutrients. B) Soft, permeable lipid easing diffusion. C) Flexible, hydrophilic sugar reducing tension. D) Rigid, waterproof polymer strengthening walls. Show Answer Correct Answer: D) Rigid, waterproof polymer strengthening walls. 15. What is the role of root hairs in plants? A) To store nutrients for the plant. B) To increase the surface area for absorption of water and minerals from the soil. C) To provide structural support to the plant. D) To facilitate photosynthesis in the roots. Show Answer Correct Answer: B) To increase the surface area for absorption of water and minerals from the soil. 16. The rate of translocation in the phloem was observed to decrease steadily after a plant was placed in an environment without oxygen for several minutes. Why did this happen? A) Active transport of mineral salts can no longer occur. B) The plant can no longer synthesize sugars to provide energy. C) The xylem no longer takes in water for the plant. D) The cells in the plants stop respiring. Show Answer Correct Answer: D) The cells in the plants stop respiring. 17. Water and mineral ions A) Are transported through a plant in xylem. The flow of water through a plant is called transpiration. B) Are transported through a plant in phloem. The flow of water through a plant is called transpiration. C) Are transported through a plant in xylem. The flow of water through a plant is called translocation. D) Are transported through a plant in phloem. The flow of water through a plant is called translocation. Show Answer Correct Answer: B) Are transported through a plant in phloem. The flow of water through a plant is called transpiration. 18. It is the movement of large molecules out of the cell via the fusion of vesicles and the cell membrane. A) Endocytosis. B) Exocytosis. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exocytosis. 19. What process moves water into the root hair cells? A) Osmosis. B) Diffusion. C) Active Transport. D) Magic. Show Answer Correct Answer: A) Osmosis. 20. Which tissue is made of living cells? A) Phloem. B) Root. C) Vascular bundle. D) Xylem. Show Answer Correct Answer: A) Phloem. 21. All of the following are forces involved in the process of transpiration EXCEPT ..... A) Root pressure. B) Capillary action. C) Transpiration pull. D) Active transport. Show Answer Correct Answer: D) Active transport. 22. What is the correct order of conduction of water and minerals by root hair cells? A) Root hairs, cortex, xylem. B) Roots Hairs, Cortex, Xylem. C) None of the above. D) Root hairs, Xylem, Cortex,. Show Answer Correct Answer: A) Root hairs, cortex, xylem. 23. Why does the rate of transpiration increase if the light intensity is increased? A) The humidity increases, which makes the rate of transpiration increase. B) The stomata open wider to let more carbon dioxide into the leaf for photosynthesis. C) The root hair cells become more permeable to water, letting more water into the plant and through the xylem. D) None of the above. Show Answer Correct Answer: B) The stomata open wider to let more carbon dioxide into the leaf for photosynthesis. 24. Which cells act as packing tissue and have many metabolic functions A) Parenchyma. B) Vascular tissue. C) Collenchyma. D) Mesophyll. Show Answer Correct Answer: A) Parenchyma. 25. Root pressure which plays a small role in xylem flow is caused by A) Transpiration of water out of the xylem. B) Cohesion of water molecules to one another. C) Adhesion of water molecules to walls of the xylem. D) Osmotic flow of water into the xylem. Show Answer Correct Answer: D) Osmotic flow of water into the xylem. 26. What is the difference between the transport direction of xylem and phloem tissue? A) Xylem transports upward, phloem transports downward. B) Xylem transports downward, phloem transports upward. C) Both xylem and phloem transport in the same direction. D) Both xylem and phloem transport in opposite directions. Show Answer Correct Answer: A) Xylem transports upward, phloem transports downward. 27. Transport of food from the leaves to other parts of the plants is called: A) Translation. B) Transpiration. C) Transcription. D) Translocation. Show Answer Correct Answer: D) Translocation. 28. Symplastic pathway involves the movement of water through the cytoplasm and plasmodesmata of the cells. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 29. What is the effect of wind on the rate of transpiration? A) Increases it. B) Stops it. C) Decreases it. D) No effect. Show Answer Correct Answer: A) Increases it. 30. Which sequence represents the correct pathway for the removal of urine from the human body? A) Ureter $\rightarrow$ kidney $\rightarrow$ urinary bladder $\rightarrow$ urethra. B) Kidney $\rightarrow$ ureter $\rightarrow$ urinary bladder $\rightarrow$ urethra. C) Urethra $\rightarrow$ kidney $\rightarrow$ urinary bladder $\rightarrow$ ureter. D) Kidney $\rightarrow$ urethra $\rightarrow$ urinary bladder $\rightarrow$ ureter. Show Answer Correct Answer: B) Kidney $\rightarrow$ ureter $\rightarrow$ urinary bladder $\rightarrow$ urethra. 31. What happens to the phloem sap movement at low temperatures? A) It speeds up. B) It reverses direction. C) It slows down or stops. D) It remains unaffected. Show Answer Correct Answer: C) It slows down or stops. 32. Which of the following is a xerophytic adaptation? A) Thin cuticle. B) Stomata are sunken in pits. C) Stomata only open during the day. D) Large leaves. Show Answer Correct Answer: B) Stomata are sunken in pits. 33. What is calculated using a potometer? A) Rate of perspiration. B) Rate of respiration. C) Rate of transpiration. D) Rate of absorption. Show Answer Correct Answer: C) Rate of transpiration. 34. What is the theory that talks about root pressure in plants called? A) Adhesion Theory. B) Transpiration Pull Theory. C) Root Pressure Theory. D) Capillary Action Theory. Show Answer Correct Answer: C) Root Pressure Theory. 35. The total surface area of xylem vessels within the ..... and ..... is greater than that in the ..... A) Root, stem, leaves. B) Leaves, stem, roots. C) Leaves, root, stem. D) Stem, root, leaves. Show Answer Correct Answer: C) Leaves, root, stem. 36. Elijah is conducting an experiment in his school garden. He wants to understand how plants transport essential nutrients. What is the function of xylem in plants? A) Transport of water and mineral ions. B) Store nutrients. C) Transport of sucrose and amino acids. D) Provide structural support to leaves. Show Answer Correct Answer: A) Transport of water and mineral ions. 37. What would happen to a plant if its xylem were damaged? A) It would stop producing sugars. B) It would not be able to perform photosynthesis. C) It would not be able to reproduce. D) It would not be able to transport water to the leaves. Show Answer Correct Answer: D) It would not be able to transport water to the leaves. 38. Attraction of water molecules to polar surface is known as: A) Capillarity. B) Adhesion. C) Tencile strength. D) Cohesion. Show Answer Correct Answer: B) Adhesion. 39. Which does not affect the rate of diffusion of a substance- A) Temperature and concentration gradient. B) Electrical charges of the diffusing materials. C) Presence of the other substances in the solution. D) Molecular diameter of the diffusing materials. Show Answer Correct Answer: C) Presence of the other substances in the solution. 40. What is the hypothesis that explains the movement of fluid through phloem in a plant? A) Root pressure hypothesis. B) Pressure-flow hypothesis. C) Cohesion-tension hypothesis. D) Transpiration-cohesion hypothesis. Show Answer Correct Answer: B) Pressure-flow hypothesis. 41. Particles move from a region of lesser concentration to greater concentration by ..... A) Diffusion. B) Active transport. C) Facilitated transport. D) Osmosis. Show Answer Correct Answer: B) Active transport. 42. ..... cells open and close the stomata A) Epidermis. B) Xylem. C) Palisade. D) Guard. Show Answer Correct Answer: D) Guard. 43. What controls the opening and closing of the stomata? A) Mesophyll Cells. B) Lignin Cells. C) Companion Cells. D) Guard Cells. Show Answer Correct Answer: D) Guard Cells. 44. Sunken stomata in rolled leaves primarily help xerophytes by doing what? A) Trapping moist air to lower water loss. B) Reducing diffusion distance for CO2 entry. C) Enhancing cuticle permeability to water. D) Increasing stomatal density for gas uptake. Show Answer Correct Answer: A) Trapping moist air to lower water loss. 45. Kelayuan berlaku apabila tumbuhan menyerap lebih banyak air daripada kehilangan air. A) BENAR. B) PALSU. C) All the above. D) None of the above. Show Answer Correct Answer: B) PALSU. 46. If external solution is more dilute than the cytoplasm of the cell it is said to be A) Isotonic. B) Hypotonic. C) Hypertonic. D) None of the above. Show Answer Correct Answer: B) Hypotonic. 47. How are the xylem and phloem arranged in plant roots? A) In the centre of the root. B) In bundles near the edge of the root. C) Evenly spaced out across the root. D) None of the above. Show Answer Correct Answer: A) In the centre of the root. 48. What is the purpose of conducting an experiment on water transport? A) To understand the mechanisms and efficiency of water movement. B) To analyze the chemical composition of water. C) To study the effects of pollution on water quality. D) To measure the temperature of water. Show Answer Correct Answer: A) To understand the mechanisms and efficiency of water movement. 49. Wilting occurs when: A) The plant produces excess glucose. B) Water loss exceeds water uptake. C) The roots take up too much water. D) Light intensity is very low. Show Answer Correct Answer: B) Water loss exceeds water uptake. 50. What is the primary function of xylem in plants? A) Transport of sugars. B) Transport of carbon dioxide. C) Transport of water and minerals. D) Transport of oxygen. Show Answer Correct Answer: C) Transport of water and minerals. 51. Water moves through xylem by mass flow from the leaves to the roots. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 52. Transport proteins of endodermal cells are control points, where a plant adjusts the quantity and type of solutes that reach the xylem. Root endodermis is able to actively transport ions in one direction only because of the layer of A) Cellulose. B) Suberin. C) Lignin. D) Actin. Show Answer Correct Answer: B) Suberin. 53. Symplastic pathway involves the movement of water through the cell wall and intercellular spaces. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. Osmosis and diffusion are same except that in osmosis there is a A) Freely permeable membrane. B) Cell wall in between. C) Selectively permeable membrane. D) None of the above. Show Answer Correct Answer: C) Selectively permeable membrane. 55. Which part of the plant is primarily involved in gas exchange? A) Flowers. B) Stem. C) Roots. D) Leaves. Show Answer Correct Answer: D) Leaves. 56. In a food chain, at what point does photosynthesis take place? A) Tertiary consumer. B) Secondary consumer. C) Primary consumer. D) Producer/green plant. Show Answer Correct Answer: D) Producer/green plant. 57. Which one of the following will not directly affect transpiration? A) Wind speed. B) Chlorophyll content of leaves. C) Temperature. D) Light. Show Answer Correct Answer: B) Chlorophyll content of leaves. 58. What drives the movement of fluid through phloem tissue in a plant? A) Capillary action. B) Pressure flow mechanism. C) Gravity. D) Transpiration pull. Show Answer Correct Answer: B) Pressure flow mechanism. 59. Why does water move upward through unlignified sections of xylem vessel walls during leaf hydration? A) Active pumping by companion cells. B) Lower resistance at unlignified pits. C) Pressure from phloem translocation. D) High solute potential in epidermis. Show Answer Correct Answer: B) Lower resistance at unlignified pits. 60. How is water transported from stems to leaves? A) Xylem. B) Stems. C) Roots. D) Phloem. Show Answer Correct Answer: A) Xylem. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books