What is the primary function of chlorophyll in photosynthesis?

• A. It absorbs light energy and drives the light-dependent reactions that convert CO2 and water into glucose and oxygen.
• B. It converts glucose into starch for storage.
• C. It aids in nutrient uptake from soil.
• D. It protects plant tissues from ultraviolet radiation.

Answer: (A)

Chlorophyll’s job is to capture light energy and use it to power the reactions of photosynthesis. By absorbing light in the leaves, it drives the light-dependent reactions that split water to release oxygen and generate ATP and NADPH. Those energy carriers then feed the Calvin cycle, where carbon dioxide is fixed into sugars like glucose. So the primary function is to turn light energy into the chemical energy and reducing power needed to synthesize carbohydrates and release oxygen. The other options describe processes handled by other parts of the plant—starch storage, nutrient uptake, or UV protection—not the role of chlorophyll in capturing light energy.