Question

How many NADPH₂ and ATP molecules are produced in a single TCA cycle?

• A. 3 and 1 respectively
• B. 2 and 1 respectively
• C. 0 and 1 respectively
• D. 3 and 2 respectively

Answer 1

Answer: (C)

Tricarboxylic acid cycle or Krebs cycle occurs in the mitochondrial matrix. In this acetyl CoA combines with oxaloacetic acid in a series of reactions to regenerate oxaloacetic acid. In this cycle 3 $NAD{H}_2$ , 1 $FAD{H}_{2,}$ and 1ATP are formed. $NADP{H}_2$ is not formed in the Kreb's cycle.