Question

In the plant shown below, during photosynthesis, what happens first?

• A. Carbon dioxide absorption followed by absorption of light.
• B. Sunlight absorption then reduction of carbon dioxide.
• C. Carbon dioxide reduction and absorption of light simultaneously.
• D. Depends on carbon dioxide levels in the surroundings.

Answer 1

The correct option is A

Carbon dioxide absorption followed by absorption of light.

The sequence of steps in photosynthesis is not always the same as in green plants. In xerophytes like cactus, CO₂ is absorbed during night, converted as an intermediate and stored. During day, light is absorbed by chlorophyll. In other green plants, carbon dioxide is absorbed during day time.