This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 11 Transport In Plants – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 11 Transport In Plants Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is not a component of the symplast? A) Sieve tube. B) Plasmodesmata. C) Endodermal cells. D) Xylem tracheids. Show Answer Correct Answer: D) Xylem tracheids. 2. How does glucose travel in the phloem A) Clockwise. B) In both direction. C) Up only. D) Down only. Show Answer Correct Answer: B) In both direction. 3. Which process are the phloem tubes part of? A) Translocation. B) Transpiration. C) All the above. D) None of the above. Show Answer Correct Answer: A) Translocation. 4. Why is it important to control variables in an experiment? A) Controlling variables is unnecessary for simple experiments. B) It is important to control variables to isolate the effects of the independent variable and ensure valid results. C) Controlling variables makes the experiment more complicated. D) It helps to increase the number of variables tested at once. Show Answer Correct Answer: B) It is important to control variables to isolate the effects of the independent variable and ensure valid results. 5. The only dead cells in phloem A) Phloem fibres. B) Companion. C) Phloem parenchyma. D) Sieve. Show Answer Correct Answer: A) Phloem fibres. 6. In the leaf, where does liquid water first evaporate before diffusing out? A) Cuticle covering the upper epidermis. B) Wet cell walls lining mesophyll spaces. C) Guard cells within stomatal pores. D) Xylem vessels inside vascular bundle. Show Answer Correct Answer: B) Wet cell walls lining mesophyll spaces. 7. The upward movement of water through the xylem is known as: A) Assimilation. B) Ascent of sap. C) Transpiration. D) Translocation. Show Answer Correct Answer: B) Ascent of sap. 8. A sudden drop in atmospheric humidity occurs outside a leaf. Predict the immediate effect on water potential and movement. A) Leaf water potential increases, transpiration decreases. B) Outside water potential decreases, transpiration increases. C) Leaf water potential decreases, evaporation ceases. D) Outside water potential increases, diffusion slows. Show Answer Correct Answer: B) Outside water potential decreases, transpiration increases. 9. When the mesophyll cells lose water their DPD- A) Increases. B) Decreases. C) Remain constant. D) None of the above is applicable. Show Answer Correct Answer: A) Increases. 10. What is the name of the process by which water moves across a plant's cell membrane? A) Diffusion. B) Active transport. C) Osmosis. D) Filtration. Show Answer Correct Answer: C) Osmosis. 11. What term describes the upward movement of water in xylem? A) Translocation. B) Transpiration pull. C) Diffusion. D) Osmosis. Show Answer Correct Answer: B) Transpiration pull. 12. Trichomes on xerophyte leaves mainly function to: A) Transport sugars to vascular tissues. B) Increase photosynthetic enzyme levels. C) Form a boundary layer reducing water loss. D) Open stomata under high humidity. Show Answer Correct Answer: C) Form a boundary layer reducing water loss. 13. Sugars and amino acids are loaded into phloem tubes using which of the following processes? A) Active transport. B) Diffusion. C) Photosynthesis. D) Osmosis. Show Answer Correct Answer: A) Active transport. 14. What are the two basic strategies proposed by Baker (1981) for higher plants to tolerate large numbers of metals in their environment? A) Exclusion and Accumulator. B) Absorption and Excretion. C) Filtration and Accumulation. D) Translocation and Storage. Show Answer Correct Answer: A) Exclusion and Accumulator. 15. Which of the following are true of xylem vessels?I. They have no end wallsII. They have pores (pits) in the outer cell wallIII. They contain lignin A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: D) I, II and III. 16. Which is not a limiting factor affecting rate of photosynthesis? A) Carbon dioxide concentration. B) Water availability. C) Temperature. D) Light intensity. Show Answer Correct Answer: B) Water availability. 17. Which of the following plant vessels is living? A) Xylem. B) Phloem. C) All the above. D) None of the above. Show Answer Correct Answer: B) Phloem. 18. During which season do leaves become the source and roots become the sinks for sucrose and amino acids? A) Spring. B) Autumn. C) Winter. D) Summer. Show Answer Correct Answer: D) Summer. 19. Describe the process of water absorption through root hairs. A) Water is absorbed through root hairs by active transport from root cells to soil. B) Water is absorbed through root hairs by osmosis, moving from soil to root cells due to concentration differences. C) Root hairs absorb water through evaporation from the leaves. D) Water enters root hairs through diffusion of nutrients from the soil. Show Answer Correct Answer: B) Water is absorbed through root hairs by osmosis, moving from soil to root cells due to concentration differences. 20. Place these statements in the correct order.I. water enters root hairs by osmosisII. the solute concentration inside root hairs increasesIII. water enters xylem vessels by osmosisIV. mineral ions enter root hairs by active transport A) I $\rightarrow$ IV $\rightarrow$ II $\rightarrow$ III. B) I $\rightarrow$ II $\rightarrow$ IV $\rightarrow$ III. C) IV $\rightarrow$ I $\rightarrow$ II $\rightarrow$ III. D) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III. Show Answer Correct Answer: D) IV $\rightarrow$ II $\rightarrow$ I $\rightarrow$ III. 21. Transporting substances across a membrane from an area of lower concentration to an area of higher concentration requires-(a) (b) (c) (d) A) Phospholipid. B) Diffusion. C) Facilitated diffusion. D) Energy. Show Answer Correct Answer: D) Energy. 22. The transport system in plants comprises of the xylem and phloem. Food substances travel in the ..... and water and salts are mainly conducted in the ..... A) Vessels; sieve tubes. B) Vascular bundles:vessels. C) Xylem; phloem. D) Phloem; xylem. Show Answer Correct Answer: D) Phloem; xylem. 23. How does water enter a plant? A) By osmosis in root hair cells. B) By active transport in root hair cells. C) Through the roots. D) Through the stomata. Show Answer Correct Answer: A) By osmosis in root hair cells. 24. Describe two factors that affect the rate of transpiration in plants. A) Temperature and color of the leaves. B) Soil pH and plant height. C) Amount of sunlight and type of pot. D) Environmental factors and internal factors. Show Answer Correct Answer: D) Environmental factors and internal factors. 25. In Xylem conduction is ..... directional A) Bidirectional. B) Unidirectional. C) All the above. D) None of the above. Show Answer Correct Answer: B) Unidirectional. 26. What is the movement of sucrose and amino acids in the phloem from sources to sinks called? A) Photosynthesis. B) Transpiration. C) Respiration. D) Translocation. Show Answer Correct Answer: D) Translocation. 27. If the external solution balances the osmotic pressure of cytoplasm. It is said to be- A) Hypotonic. B) Hypertonic. C) Isotonic. D) Atonic. Show Answer Correct Answer: C) Isotonic. 28. Which of the following describes the distribution of xylem and phloem in the stems of dicotyledonous plants? A) The xylem vessels are surrounded by the phloem vessels. B) The phloem vessels are surrounded by the xylem vessels. C) The xylem vessels are above the xylem. D) The phloem vessels are above the xylem. Show Answer Correct Answer: A) The xylem vessels are surrounded by the phloem vessels. 29. True or False:root hairs can take up mineral salts agains their concentration gradient A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 30. Highest water potential is observed in case of A) Solution in a beaker. B) Cell sap. C) Pure water solvent. D) All of the above. Show Answer Correct Answer: C) Pure water solvent. 31. Xylem and phloem are examples of ..... tissue A) Spores. B) Seeds. C) Nonvascular. D) Vascular. Show Answer Correct Answer: D) Vascular. 32. Xylem translocates A) H$_{2}$O only. B) H$_{2}$O and mineral salts only. C) H$_{2}$O, mineral salts and some organic nitrogen only. D) H$_{2}$O, mineral salts, some organic nitrogen and hormones. Show Answer Correct Answer: D) H$_{2}$O, mineral salts, some organic nitrogen and hormones. 33. What is the fate of most of the oxygen produced by photosynthesis A) Evaporates. B) Diffuses out through the stomata. C) Stored in the leaf. D) None of the above. Show Answer Correct Answer: B) Diffuses out through the stomata. 34. Which of the following is responsible for the transport of sugars ONLY. A) Epidermis. B) Phloem. C) Xylem. D) Spongy mesophyll. Show Answer Correct Answer: B) Phloem. 35. Large molecules and ions can easily pass through the cell membrane without any help A) True-they pass right through. B) False-they need a protein channel. C) All the above. D) None of the above. Show Answer Correct Answer: B) False-they need a protein channel. 36. The ascent of sap takes places through A) Cortex. B) Epidermis. C) Xylem. D) Phloem. Show Answer Correct Answer: C) Xylem. 37. Translocation in plants refers to: A) Movement of water. B) Movement of food. C) Movement of gases. D) Movement of chloroplasts. Show Answer Correct Answer: B) Movement of food. 38. Which of the following is NOT true about plasma? A) Transport waste materials. B) Pale yellow liquid. C) Consist mainly of water. D) Transport blood. Show Answer Correct Answer: D) Transport blood. 39. Root pressure, capillarity, cohesion and adhesion all contribute to A) The mass flow of nutrients along sieve elements. B) The movement of sucrose along the phloem. C) The loss of water via the leaves. D) The ascent of water in xylem vessels. Show Answer Correct Answer: D) The ascent of water in xylem vessels. 40. What causes wilting in plants? A) Water loss is greater than uptake. B) Too much oxygen. C) Excess mineral ions. D) Loss of chlorophyll. Show Answer Correct Answer: A) Water loss is greater than uptake. 41. When stomata open the pH of guard cells A) Increases. B) Decrease. C) Remains same. D) Both 1 and 2. Show Answer Correct Answer: A) Increases. 42. Transpiration supplies water for photosynthesis. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 43. What could increase the rate of water uptake by a shoot? A) Covering the shoot with a black plastic bag. B) Covering the shoot with a clear plastic bag. C) Shining a bright light onto the shoot. D) Removing the leaves from the shoot. Show Answer Correct Answer: C) Shining a bright light onto the shoot. 44. Most stomata are usually found on the underside of leaves. Why? A) Conserve water. B) Get more CO2. C) Prevent infection. D) None. Show Answer Correct Answer: A) Conserve water. 45. Waxy covering of leaves A) Endodermis. B) Pericycle. C) Cuticle. D) Epidermis. Show Answer Correct Answer: C) Cuticle. 46. The transport of molecules across a membrane that does not require energy. A) Active transport. B) Passive transport. C) All the above. D) None of the above. Show Answer Correct Answer: B) Passive transport. 47. What should be kept constant in the potometer experiment to ensure valid results? A) Humidity. B) Wind speed. C) Temperature. D) All of the above. Show Answer Correct Answer: D) All of the above. 48. What is a 'source' in translocation? A) Part that releases sucrose or amino acids. B) Part that absorbs water. C) Part of the plant where sucrose is stored. D) Part that absorbs carbon dioxide. Show Answer Correct Answer: A) Part that releases sucrose or amino acids. 49. Which of the atmospheric factor act as anti transpirant A) SO2. B) CO. C) CO2. D) All pollutant gases. Show Answer Correct Answer: C) CO2. 50. Which plant tissue is made up of dead, hollow, and elongated cells? A) Phloem. B) Xylem vessels. C) Collenchyma. D) Parenchyma. Show Answer Correct Answer: B) Xylem vessels. 51. Proses pengangkutan hasil fotosintesis daripada daun ke seluruh bahagian tumbuhan dikenali sebagai ..... A) Pengangkutan aktif. B) Pindah silang. C) Translokasi. D) Gutasi. Show Answer Correct Answer: C) Translokasi. 52. Harper is conducting an experiment in her garden to understand the relationship between the number of stomata on plant leaves and the rate of transpiration. What does she find? A) Fewer stomata lead to faster transpiration. B) More stomata lead to faster transpiration. C) Stomata have no effect on transpiration. D) More stomata lead to slower transpiration. Show Answer Correct Answer: B) More stomata lead to faster transpiration. 53. Which type of cells in the plant's phloem are responsible for the transport of sugars? A) Xylem cells. B) Root hairs. C) Sieve tube elements. D) Guard cells. Show Answer Correct Answer: C) Sieve tube elements. 54. Osmosis is diffusion of A) Solute. B) Free energy. C) Water. D) Solute and solvent. Show Answer Correct Answer: C) Water. 55. Which of the following is not a type of transpiration? A) Cuticular transpiration. B) Stomata. C) Lenticular transpiration. D) Stomatal transpiration. Show Answer Correct Answer: B) Stomata. 56. Multidirectional flow of a variety of organic and inorganic solutes occurs through- A) Xylem. B) Root. C) Vascular tissue. D) Phloem. Show Answer Correct Answer: D) Phloem. 57. How does water move from the soil to the root hair cells? A) Diffusion. B) Osmosis. C) Transpiration. D) Active transport. Show Answer Correct Answer: B) Osmosis. 58. Which force helps to pull water up the stem during transpiration? A) Gravity. B) Transpiration pull. C) Diffusion gradient. D) None of the above. Show Answer Correct Answer: B) Transpiration pull. 59. Which process helps pull water up through the plant as it evaporates from the leaves? A) Transpiration. B) Respiration. C) Germination. D) Photosynthesis. Show Answer Correct Answer: A) Transpiration. 60. Which one is highly selective? A) Simple diffusion and Active transport. B) Active transport and facilitated diffusion. C) Simple diffusion and facilitated diffusion. D) Active transport and passive transport. Show Answer Correct Answer: B) Active transport and facilitated diffusion. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books