Question

multiple choice question
the production of nadph from nadp⁺ requires ______ electron(s) from the electron transport system.

○ 1

○ 2

○ 3

○ 4

Explanation:

To determine the number of electrons required for the production of NADPH from \( \text{NADP}^+ \), we recall the redox reaction of \( \text{NADP}^+ \) to \( \text{NADPH} \). The reduction of \( \text{NADP}^+ \) (oxidation state of N in \( \text{NADP}^+ \) is +5, and in NADPH it is +3) involves a gain of 2 electrons. The reaction can be represented as \( \text{NADP}^+ + 2e^- + \text{H}^+
ightarrow \text{NADPH} \). So, the production of NADPH from \( \text{NADP}^+ \) requires 2 electrons.

Answer:

2 (corresponding to the option with "2" as the choice)