Question

Assimilatory powers formed in the photochemical phase of photosynthesis are ____ .

• A. ADP and ATP
• B. ADP and NADP
• C. ATP and NADPH
• D. NADP and NADPH

Answer 1

The Correct Option is C

To solve the problem, we need to identify the assimilatory powers formed during the photochemical phase (light reaction) of photosynthesis.

1. Understanding the Photochemical Phase:
The photochemical phase, or the light reaction of photosynthesis, involves capturing solar energy to produce chemical energy-rich compounds.

2. Identifying Assimilatory Powers:
The primary assimilatory powers produced in the light-dependent reactions are ATP and NADPH, which provide the energy and reducing power needed for the subsequent dark reactions (Calvin cycle).

3. Selecting the Correct Option:
From the given options:
(1) ADP and ATP – Incorrect (ADP is not an assimilatory power)
(2) ADP and NADP – Incorrect (both are not assimilatory powers, rather they are used as substrates)
(3) ATP and NADPH – Correct (both are produced in light reactions and serve as energy currency)
(4) NADP and NADPH – Incorrect (NADP is a substrate, not assimilatory power)

Final Answer:
The correct option is (C) ATP and NADPH.