Transport in Plants MCQs Multiple Choice Questions with Answers
1. Which of the following is common between guard cells and mesophyll cells?
a. Dumb-bell shape
b. Differentially thick wall
c. Presence of chloroplast
d. Uniformly thin wall
Answer: c. Presence of chloroplast
2. Which of the following is NOT the characteristic of active transport?
a. It requires special membrane proteins.
b. It is liable to saturate
c. It is under hormonal regulations
d. It does not require ATP energy
Answer: c. It is under hormonal regulations
3. Major loss of water in transpiration occurs through:
a. Cuticle
b. Bark
c. Hydathodes
d. Stomata
Answer: d. Stomata
4. Stomatal opening is under the control of:
a. Epidermal cells
b. Palisade cells
c. Spongy parenchyma cells
d. Guard cells
Answer: d. Guard cells
5. What is the cause of strong cohesive forces of water?
a. Ionic bonds
b. Oh bond
c. S bonds
d. H bonds
Answer: d. H bonds
6. Water entering in root due to diffusion is part of which of the following?
a. Endocytosis
b. Osmosis
c. Passive absorption
d. Active absorption
Answer: c. Passive absorption
7. Which growth hormone is associated with Stomatal opening?
a. Auxin
b. ABA
c. Gibberellin
d. Cytokinin
Answer: b. ABA
8. Plant cells kept in hypertonic solution will get:
a. Lysed
b. Turgid
c. Deplasmolysis
d. Plasmolysis
Answer: d. Plasmolysis
9. Which one of the following occurs in insignificant amount in xylem?
a. Water
b. Nitrate
c. Phosphate
d. Sugar
Answer: d. Sugar
10. Epithem is associated with which of the following?
a. Respiration
b. Guttation
c. Transpiration
d. Photosynthesis
Answer: b. Guttation
11. The rate of absorption can be increased through:
a. Decreased transpiration
b. Decreased ion absorption
c. Increased photosynthesis
d. Increased transpiration
Answer: d. Increased transpiration
12. Under which condition does the diffusion pressure deficit (DPD) become more than O.P. (osmotic pressure)?
a. O.P. < T.P.
b. O.P. = T.P.
c. O.P. < T.P.
d. T.P. is negative
Answer: d. T.P. is negative
13. The Stomatal type of cereal which open only for a few hours during the day is:
a. Barley type
b. Potato type
c. Alfalfa type
d. Bean type
Answer: a. Barley type
14. Which of the following is used as an antitranspirant?
a. Cobalt chloride
b. Mercury
c. Potassium
d. Phenyl mercuric acetate
Answer: d. Phenyl mercuric acetate
15. Conversion of starch to organic acids is required for:
a. Stomatal opening
b. Stomatal formation
c. Stomatal closing
d. Stomatal activity
Answer: a. Stomatal opening
16. With the decrease in atmospheric pressure, the rate of transpiration will…?
a. Increase
b. Decrease
c. Stay unchanged
d. Decreases rapidly
Answer: a. Increase
17. By opening and closing the stomata Guard cells help to regulate the rate of…?
a. Translocation
b. Transpiration
c. Guttation
d. Transcription
Answer: b. Transpiration
18. Who regulates transpiration?
a. Mesophyll tissue of the leaf
b. Guard cells
c. Parenchyma cells
d. Epithelial cells
Answer: b. Guard cells
19. Steroid hormones can pass through the plasma membrane by simple diffusion because they are…?
a. Lipid Soluble
b. Carbon-based
c. Gaseous
d. Water Soluble
Answer: a. Lipid Soluble
20. When living cells are placed in an isotonic solution, they retain their shape and size. This is based on which one of the following principles?
a. Mitosis
b. Diffusion
c. Transpiration
d. Osmosis
Answer: d. Osmosis
21. Transport of food materials in higher plants takes place through…?
a. Companion cells
b. Transfusion cells
c. Sieve elements
d. Tracheids
Answer: c. Sieve elements
22. About 90% of the flowering plants have…?
a. Naked seeds
b. Spores
c. Mycorrhizae
d. None of these
Answer: c. Mycorrhizae
23. The movement of materials from the leaves to other tissues of the plant is known as…?
a. Guttation
b. Tropic movement
c. Transpiration
d. Translocation
Answer: d. Translocation
24. What is the main transport item of the xylem?
a. Water and dissolved sugar
b. Water and dissolved mineral salts
c. Water only
d. Minerals only
Answer: b. Water and dissolved mineral salts
25. Choose the correct statement about Transpiration in plants:
a. the removal of water from the hydathodes
b. The evaporation of water from the leaves
c. The movement of water from the root hair cells
d. The release of energy in plant cells
Answer: b. The evaporation of water from the leaves
26. The movement of molecules from their higher concentration to lower concentration – this statement is related to…?
a. Osmosis
b. Active transport
c. Diffusion
d. Transpiration
Answer: c. Diffusion
27. How are sucrose and amino acids transported in a plant?
a. Through the xylem
b. Through the xylem and phloem
c. Through the phloem
d. Through the Sieve tubes
Answer: c. Through the phloem
28. In which direction do water and minerals move within the plants?
a. Roots > Stem > Leaves
b. Leaves > Roots > Stem
c. Root hairs > Leaves > Veins
d. Stem > Roots
Answer: a. Roots > Stem > Leaves
29. What is the main function of root hairs?
a. Uptake of water and nutrients from the rhizosphere
b. Uptake of food and nutrients from the rhizosphere
c. Removal of water from the hydathodes
d. Transport carbohydrates upwards in the plant
Answer: a. Uptake of water and nutrients from the rhizosphere
30. How does wind speed affect the rate of transpiration?
a. It decreases
b. It increases
c. Remains the same
d. None of these
Answer: b. It increases
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