Transport in Plants

Q1. Cohesion theory of water movement in plants was put forth by.

1. Henry Dixon.
2. F. F. Blackman.
3. Melvin cycle.
4. Hans. A. Krebs.

Q2. The direction and rate of water movement from cell to cell is based on:

1. WP
2. TP
3. DPD
4. Incipient plasmolysis.

Q3. If a soft stemmed plant, is cut horizontally near the base of its stem with a sharp blade on early
morning of a humid day, drops of solution ooze through cut stem. This is due to:

1. Root pressure.
2. Bleeding.
3. Guttation.
4. Transpiration pull.

Q4. Choose the correct sequence of water movement in the plants.

1. Cortex, protoxylem, endodermis, root hair, pericycle, metaxylem.
2. Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem.
3. Root hair, protoxylem, metaxylem, pericycle, cortex, endodermis.
4. Root hair, pericycle, endodermis, cortex, protoxylem, metaxylem.

Q5. Substances which need facilitated diffusion have which kind of moiety?

1. Hydrophobic.
2. Hydrophilic.
3. Lipophilic.
4. Lipophobic.

Q6. In guard cells when sugar is converted into starch the stomatal pore.

1. Opens fully.
2. Opens partially.
3. Closes completely S P.
4. Remains unchanged.

Q7. Tension is a result of which of the following?

1. The cohesive nature of water.
2. The narrowness of the xylem tube.
3. Transpiration at the leaf surface.
4. All of the above.

Q8. Opening and closing of stomata is due to:

1. Hormonal changes in the guard cells.
2. Changes in the turgor pressure of guard cells.
3. Respiration of guard cells.
4. Cytoplasmic streaming.

Q9. Death of protoplasm is a pre-requisite for a vital function like.

1. Transport of sap.
2. Transport of food.
3. Aabsorption of water.
4. Gaseous exchange.

Q10. In soil, the water available for root absorption is:

1. Combined water.
2. Gravitational water.
3. Hygroscopic water.
4. Capillary water.

Q11. Two types of molecules cross the membrane in the same direction, it is called as:

1. Uniport.
2. Symport.
3. Antiport.
4. Multiport.

Q12. Solution outside a cell has higher concentration than cytoplasm, then the solution is:

1. Hypertonic.
2. Acidic.
3. Isotonic.
4. Hypotonic.

Q13. Water logging of soil makes it physiologically dry because:

1. This condition does not allow the capillary force to work.
2. Both
3. This condition does not allow oxygen to enter the soil.
4. None of the above.

Q14. Which one of the following process help the water-soluble inorganic nutrients go down into the soil
horizon and get precipitated as unavailable salts?

1. Leaching.
2. Fragmentation.
3. Catabolism.
4. None of these.

Q15. Which of the following is used to determine the rate of transpiration in plants?

1. Porometer.
2. Potometer.
3. Auxanometer.
4. Tensiometer.

Q16. Which one of the following will not directly affect transpiration?

1. Temperature.
2. Light.
3. Wind speed.
4. Chlorophyll content of leaves.

Q17. Mark the mismatched pair.

1. Amyloplast – Store protein granule
2. Elaioplast – Store oils or fats
3. Chloroplasts- Contain chlorophyll pigments
4. Chromoplasts – Contain coloured pigments other than chlorophyll

Q18. Which of the following is used as antitranspirant?

1. Cobalt chloride.
2. Phenyl mercuric acetate.
3. Naphthol acetic acid.
4. Calcium carbonate.

Q19. Osmotic pressure in the leaf cells is positive during:

1. Excessive transpiration.
2. Low transpiration.
3. Excessive absorption.
4. Guttation

Q20. Sieve tubes are suited for translocation of food because they possess:

1. Bordered pits.
2. No ends walls.
3. . Broader lumen and perforated cross walls.
4. No protoplasm.

Q21. The movement of mineral ions into plant root cells as a result of diffusion is called:

1. Passive absorption.
2. Active absorption.
3. Osmosis.
4. Endocytosis.

Q22. Which of the following will have higher concentration of solute?

1. Isotonic solution.
2. Hypotonic solution.
3. Hypertonic solution.
4. Solution with high water potential.

Q23. The form of sugar transported through phloem is:

1. Glucose.
2. Fructose.
3. Sucrose.
4. Ribose.

Q24. Root pressure develops as a result of:

1. Active absorption.
2. Passive absorption.
3. Increased rate of absorption.
4. Increased rate of photosynthesis.

Q25. When a seed is soaked overnight in water, what happens to its cells?

1. They become flaccid.
2. They become turgid.
3. They become either flaccid or turgid.
4. No change.

Q26. When a plant undergoes senescence, the nutrients may be:

1. Accumulated.
2. Bound to cell wall.
3. Translocated.
4. None of these.

Q27. The phenomenon of plasmolysis is evident when cells are kept in:

1. Hypertonic solution.
2. Isotonic solution.
3. None of the above.
4. Hypotonic solution.

Q28. Which of the following elements plays an important role in opening of stomata?

1. Sodium.
2. Potassium.
3. Calcium.
4. Magnesium.

Q29. Plasmolysis occurs when the cell is placed in:

1. Isotonic solution.
2. Hypertonic solution.
3. Hypotonic solution.
4. None of the above.

Q30. Guttation is caused by.

1. Transpiration.
2. Osmosis/ DPD.
3. Root pressure.
4. Osmotic pressure.