How many ATPs does one NADH ideally give?
Correct answer: D. 3
- A. 1
- B. 2
- C. 4
- D. 3
Explanation
In the electron transport chain, electron carriers take electrons from NADH and FADH2 and pass them through a chain of complexes. The ETC takes the energy from these electrons and pumps protons (H+) into the intermembrane space. This creates a gradient of a high proton concentration in the intermembrane space and a low concentration in the matrix of mitochondria. ATP synthase uses this energy to make ATP. One NADH makes 3 ATPs and one FADH2 makes 2 ATPs.
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