Question

Dark reaction in photosynthesis is called so because

• A. It does not require light energy.
• B. Cannot occur during daytime.
• C. Occurs more rapidly at night.
• D. It can also occur in darkness.

Answer 1

The correct option is A It does not require light energy.

Dark reactions do not need light. Instead, dark reaction uses ATP and NADPH${}_2$ to produce energy molecules. No photosystem is required. Photolysis of water does not occur. The dark reaction in photosynthesis is called so because it does not require light energy.

So, the correct answer is option A.