Question

Which of the following are required for the dark reaction of photosynthesis?
A. Light
B. Chlorophyll
C. CO₂
D. ATP
E. NADPH
Choose the correct answer from the options given below:

• A. A, B and C only
• B. B, C and D only
• C. C, D and E only
• D. D and E only

Answer 1

The Correct Option is C

The dark reaction of photosynthesis, also known as the Calvin cycle, occurs in the stroma of chloroplasts and does not directly require light. Instead, it utilizes the products of the light-dependent reactions. Specifically, the Calvin cycle requires:

• CO₂ (Carbon Dioxide): This is fixed into organic molecules.
• ATP (Adenosine Triphosphate): Provides the energy needed for the synthesis of glucose.
• NADPH (Nicotinamide Adenine Dinucleotide Phosphate): Supplies the reducing power to convert 3-phosphoglycerate into glyceraldehyde-3-phosphate.

These requirements align with options C, D, and E only. 

Therefore, the correct answer is: C, D and E only