An electron carrier that converts to NADPH when carrying two high-energy electrons is?

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Multiple Choice

An electron carrier that converts to NADPH when carrying two high-energy electrons is?

Explanation:
NADP+ is the electron carrier that becomes NADPH when it accepts two high-energy electrons plus a proton. In photosynthesis, NADP+ accepts electrons from the light-driven electron transport chain (via ferredoxin and ferredoxin-NADP+ reductase) to form NADPH. This NADPH carries reducing power to biosynthetic pathways such as the Calvin cycle. NAD+ would form NADH, not NADPH, when it accepts two electrons and a proton. FAD accepts electrons to form FADH2, which is a different carrier. So the one that converts to NADPH is NADP+.

NADP+ is the electron carrier that becomes NADPH when it accepts two high-energy electrons plus a proton. In photosynthesis, NADP+ accepts electrons from the light-driven electron transport chain (via ferredoxin and ferredoxin-NADP+ reductase) to form NADPH. This NADPH carries reducing power to biosynthetic pathways such as the Calvin cycle.

NAD+ would form NADH, not NADPH, when it accepts two electrons and a proton. FAD accepts electrons to form FADH2, which is a different carrier. So the one that converts to NADPH is NADP+.

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