Multiple Choice
In the context of organic chemistry, what is the primary role of NADH and FADH2?
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Intro to Organic Chemistry
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In the process of photosynthesis within chloroplasts, which molecule donates electrons for the synthesis of NADPH?
A
Carbon dioxide (CO2)
B
Glucose (C6H12O6)
C
Oxygen (O2)
D
Water (H2O)
Verified step by step guidance1
Understand the role of water in photosynthesis: Water (H2O) is a crucial molecule in the light-dependent reactions of photosynthesis, which occur in the thylakoid membranes of chloroplasts.
Identify the process of photolysis: During photosynthesis, water molecules are split into oxygen, protons, and electrons through a process called photolysis, which is driven by light energy.
Recognize the electron donation: The electrons released from the splitting of water are used to replace the electrons lost by chlorophyll in Photosystem II, which are then passed through the electron transport chain.
Connect to NADPH synthesis: As electrons move through the electron transport chain, they eventually reach Photosystem I, where they are used to reduce NADP+ to NADPH, a crucial molecule for the Calvin cycle.
Conclude the electron source: Therefore, water (H2O) is the molecule that donates electrons for the synthesis of NADPH during photosynthesis.
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