Question

Describe one role of the grana in the process of photosynthesis.

A) Grana store excess oxygen for use in the dark reactions.
B) Grana synthesize glucose from carbon dioxide and water.
C) Grana house the pigments and proteins involved in the light-dependent reactions.
D) Grana regulate the temperature of the chloroplasts during photosynthesis.

Answer 1

The grana house the pigments and proteins involved in the light-dependent reactions of photosynthesis.

Step-by-step explanation:

The primary role of the grana in the process of photosynthesis is option C) Grana house the pigments and proteins involved in the light-dependent reactions.

The grana are neat stacks of thylakoid membranes found in chloroplasts. These thylakoid membranes contain chlorophyll, the green pigment that captures light energy, and other pigments and proteins involved in the light-dependent reactions of photosynthesis. These reactions convert light energy into chemical energy, which is used to produce ATP and NADPH, the energy carriers that power the Calvin cycle.

In summary, the grana, consisting of thylakoid membranes, house the pigments and proteins necessary for the light-dependent reactions of photosynthesis, playing a vital role in capturing and converting light energy into chemical energy.