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Question

Which of the following is not a product of the light reaction of photosynthesis? 



Your Answer
A
NADPH
Correct Answer
B
NADH
Your Answer
C
ATP 
Your Answer
D
Oxygen

Solution

The correct option is D NADH

 The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs. There, water (H20) is oxidized, and oxygen (O2) is released. The electrons freed up from the water are transferred to ATP and NADPH. The dark reaction occurs outside of the thylakoids. In this reaction, the energy from ATP and NADPH are used to fix carbon dioxide (CO2). So NADH is not a product of the light reaction of photosynthesis. 

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