Question

Dark reaction in photosynthesis is called so because

• A. It occurs more rapidly at night
• B. It can occur in the dark also
• C. It does not depend on light energy
• D. It cannot occur during daylight

Answer 1

The correct option is C It does not depend on light energy

Dark reaction:

• Dark reaction in plants is the actual biosynthetic phase of photosynthesis.
• In this phase, glucose is synthesized using the $ATP$ and $NADPH$ produced from the light-dependent reaction.
• It is called a dark reaction as the reaction does not require sunlight.
• Thus dark reaction is also known as a light-independent reaction.
• It depends only on the products of light reaction.

Final answer: It does not depend on light energy