Kaplan Nursing Entrance Exam Practice 2025 – Comprehensive Prep

Question: 1 / 2700

What is the energy currency produced during the Krebs cycle?

ADP

Adenosine Triphosphate (ATP)

The energy currency produced during the Krebs cycle is Adenosine Triphosphate (ATP). ATP is a critical molecule in cellular metabolism as it serves as the primary energy carrier in all living cells. During the Krebs cycle, which occurs in the mitochondrial matrix, a series of enzymatic reactions take place that oxidize acetyl-CoA, ultimately yielding ATP along with other high-energy electron carriers.

While NADH and FADH2 are also produced during the Krebs cycle and act as carriers of electrons to the electron transport chain to produce additional ATP, they themselves are not the direct energy currency. ADP, on the other hand, is a nucleotide that, when combined with a phosphate group, forms ATP. Thus, while it plays a role in the energy production process, it is not the end product that serves as the energy currency. Therefore, the correct answer is ATP, as it directly powers cellular activities needing energy.

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NADH

FADH2

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