- 1(current)
Q. No.Opening and closing of stomata are due to the:
1. Hormonal change in guard cells
2. Change in Turgor pressure of guard cells
3. Gaseous exchange
4. Respiration
Subtopic: Â Stomata |
 91%
Level 1: 80%+
AIPMT - 2002
Hints
Mark the statements true (T) or false (F).
| A. | Less than 1 percent of water reaching the leaves is used in photosynthesis and plant growth. |
| B. | Cellulose microfibrils of guard cells are oriented longitudinally, making it easier for the stoma to open. |
| C. | Transpiration can create pressure sufficient to lift a xylem sized column of water over 130 metres high. |
| D. | C4 plants lose only half as much water as a C3 plant for the same amount of CO2 fixed. |
| A | B | C | D | |
| 1. | F | T | F | T |
| 2. | F | T | F | F |
| 3. | T | F | T | T |
| 4. | T | F | F | T |
Subtopic: Â Transpiration & Guttation |Â Stomata |
 81%
Level 1: 80%+
Hints
Which of the following facilitates opening of stomatal aperture?
| 1. | Decrease in turgidity of guard cells |
| 2. | Radial orientation of cellulose microfibrils in the cell wall of guard cells |
| 3. | Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells |
| 4. | Contraction of outer wall of guard cells |
Subtopic: Â Stomata |
 73%
Level 2: 60%+
NEET - 2017
Hints
The inner wall of guard cell is not
1. Thin
2. Elastic
3. Towards the pore or stomatal aperture
4. All of these
Subtopic: Â Stomata: 1 |Â Stomata |
 69%
Level 2: 60%+
Hints
Links
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.