What Substance Serves as the Electron Donor for Most Reductive

Question

What substance serves as the electron donor for most reductive biosynthetic pathways?
A) NADPH
B) NADH
C) FADH2
D) FMNH2
E) None of the answers is correct.

Accepted Answer

NADPH is the primary electron donor in reductive biosynthesis, providing the necessary reducing power for anabolic reactions.