Question

State whether True or False.

During the daytime, the guard cells begin photosynthesis and the glucose produced during the process increases the osmotic pressure which draws water from the adjoining cells due to endosmosis.

• A. True
• B. False

Answer 1

The correct option is A

True

True. The guard cells photosynthesize during daytime resulting into formation of carbohydrates. These carbohydrates exert osmotic pressure on the neighbouring cells drawing water from them.

Light → Photosynthesis in guard cells → Formation of sugar Increase of osmotic pressure of cell sap → Endosmosis takes place from subsidiary cell to guard cell → Increase of turgor pressure in guard cells → Stomata open.