What is the most common electron acceptor in the kreb cycle?

a) nad+

b) fadh2

c) fad

d) citrate

e) nadh

a) nad+

Explanation:

Both NAD + and FAD as electron acceptor in the Kreb Cycle, but every turn of the citric acid cycle releases two carbon dioxide molecules and consumes three NAD + to give three molecules NADH (in three different steps) but also consumes one FAD to produce one molecule FADH2 (in one single step).

Each NAD + accepts one electron, while each FAD accepts two electrons.

Thus, NAD + accepts three electrons in total per cycle while FAD accepts two electrons in total per cycle.