Photosynthesis in Higher PlantsMedium

Question

Which of the following are required for the dark reaction of photosynthesis?

A. Light

B. Chlorophyll

C. ${CO}_{2}$

D. ATP

E. NADPH

Choose the correct answer from the options given below:

Options

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

Solution

Sol. [Key Concept: Calvin cycle requirements]

The Calvin cycle uses CO₂ as its carbon source, ATP as an energy source and NADPH as reducing power. It does not directly use photons or chlorophyll, although its ATP and NADPH normally come from the light reactions. Therefore C, D and E are required: option (1).

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