Question

During aerobic respiration, out of 38 ATP molecules produced from one glucose, how many ATP molecules are formed through ETS?

• A. 10
• B. 22
• C. 24
• D. 34

Hint:

Of the 38 ATP, only 4 come from substrate level phosphorylation.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
In the older count, aerobic respiration of one glucose gives 38 ATP.

Step 2: Count
Glycolysis gives 2 ATP and the Krebs cycle gives 2 ATP by substrate level phosphorylation, so 4 ATP in total.
The rest come from the electron transport system.

Step 3: Calculation
\(38 - 4 = 34\).

Step 4: Conclusion
34 ATP are formed through ETS.

Final Answer:
34 ATP molecules are formed through ETS. \[ \boxed{\text{(D) }34} \]