Question

How many molecules of ATP is produced from one molecule of ${\mathrm{FADH}}_2$?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B 2

NADH (reduced nicotinamide adenine dinucleotide) and ${\mathrm{FADH}}_2$ (reduced flavin adenine dinucleotide) are high energy electron carriers. They are produced during the Krebs cycle. These molecules are capable of further producing ATP molecules by transfer of electrons and with the enzyme ATP synthase. One NADH molecule produces 3 ATP molecules. Whereas one ${\mathrm{FADH}}_2$ molecule produces 2 ATP molecules.