Question

In photosynthesis, hydrogen is transferred from the light reactions to dark reactions by

• A. DNP
• B. DNA
• C. ATP
• D. NADP

Answer 1

The correct option is D NADP

Photosynthesis occurs in two stages, light reaction, and dark reaction. During the light reaction reduced NADPH${}_2$ and ATP are synthesized. These products are used subsequently to reduce carbon dioxide into sugars. The purpose of ATP in photosynthesis is to transfer energy from light reaction to dark reaction. The purpose of NADP is to transfer hydrogen from light reaction to dark reaction in the form of reduced NADPH${}_2$.

So, the correct answer is option D.