Question

The source of hydrogen for carbon assimilation during photosynthesis is

• A. $NADPH$
• B. $FAD{H}_2$
• C. $H_{2}O$
• D. $RuBP$.

Answer 1

Answer: (A)

$NADPH$

ATP and NADPH are the products of the light reaction. These are then used in the biosynthetic or the dark phase of photosynthesis to form sugars. ATP provides the necessary energy required during the dark phase and NADPH is the source of hydrogen for carbon assimilation.

So, the correct option is 'NADPH'.