Question

During aerobic respiration, the total number of ATP formed through oxidative phosphorylation / ETS from one glucose molecule is ______________.

• A. thirty
• B. thirty eight
• C. eight
• D. thirty four

Hint:

Actual ATP yield may be slightly less in eukaryotic cells due to shuttle losses.

Answer 1

The Correct Option is B

Step 1: Understanding oxidative phosphorylation.
Oxidative phosphorylation occurs in the electron transport system (ETS) of mitochondria.
Step 2: ATP yield from one glucose.
NADH and FADH$_2$ generated during glycolysis, link reaction, and Krebs cycle donate electrons to ETS.
Step 3: Total ATP count.
Complete aerobic respiration of one glucose molecule yields a total of 38 ATP molecules.
Step 4: Conclusion.
Hence, the correct answer is thirty eight ATP.