Question

What happens to NAD+ in the Krebs cycle and where does the resulting molecule go to next?

a) NAD+ is reduced to NADH and enters the electron transport chain.
b) NAD+ is oxidized to NADH and remains in the Krebs cycle.
c) NAD+ is converted to ATP and is used for energy.
d) None of the above

Answer 1

In the Krebs cycle, NAD+ is reduced to NADH, which then carries electrons to the electron transport chain for ATP production.

Step-by-step explanation:

The correct answer to the question of what happens to NAD+ in the Krebs cycle is: a) NAD+ is reduced to NADH and enters the electron transport chain. During the Krebs cycle, NAD+ accepts electrons and a hydrogen ion, thus getting reduced to NADH. This is an essential step in cellular respiration as NADH carries the electrons to the electron transport chain where they are used to generate a proton gradient that ultimately leads to the production of ATP via oxidative phosphorylation.