Question

The specific function of light in the process of photosynthesis is to

• A. reduce carbon dioxide
• B. synthesize glucose
• C. activate chlorophyll
• D. split water molecule

Answer 1

The correct option is D

split water molecule

The correct option is D.

Explanation for the correct option

1. Photosynthesis is the process of synthesizing glucose by using carbon dioxide and water as the raw materials in the presence of sunlight.
2. There are two steps of photosynthesis: light reaction and dark reaction.
3. The light reaction occurs in the presence of light.
4. Light energy is absorbed by the green pigment called chlorophyll that excites electrons, leading to water splitting.

Explanation for incorrect options

Option A:

The reduction of carbon dioxide occurs in the dark reaction of photosynthesis that does not require light.

Option B:

Glucose is the end product of photosynthesis formed after reducing carbon dioxide in the dark reaction.

Option C:

Chlorophyll is the green pigment present in chloroplast. It does not have any regulatory site to become activated.

The function of light in photosynthesis is the splitting of the water molecule.