Question

Connecting link between light phase and dark phase of photosynthesis is

• A. Only $ATP$
• B. Only $NAD{H}_2$
• C. Only $NADP{H}_2$
• D. Both A and C

Answer 1

The correct option is D Both A and C

Photosynthesis occurs in two stages- light reaction and dark reaction. During the light reaction, $NADP{H}_2$ 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 $NADP{H}_2$. Hence, ATP and reduced $NADP{H}_2$ form the connecting link between light phase and dark phase of photosynthesis.