Question:
How many ATP molecules are produced through ETS, out of 38 molecules produced after complete oxidation of one glucose molecule?
How many ATP molecules are produced through ETS, out of 38 molecules produced after complete oxidation of one glucose molecule?
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Subtract the ATP made by substrate level phosphorylation from the total of 38.
Updated On: Nov 12, 2026
- \(4\)
- \(8\)
- \(32\)
- \(34\)
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
ATP made without the ETS is by substrate level phosphorylation: 2 in glycolysis and 2 in the Krebs cycle, a total of 4.
Step 2: Calculation
ATP from the ETS \(=38-4=34\).
Step 3: Check
There are 10 NADH (2 in glycolysis, 2 in the link reaction, 6 in the Krebs cycle) and 2 \(\text{FADH}_2\).
Using 3 ATP per NADH and 2 per \(\text{FADH}_2\), \(30+4=34\).
Final Answer:
34 ATP molecules are produced through the ETS. \[ \boxed{\text{(D) }34} \]
ATP made without the ETS is by substrate level phosphorylation: 2 in glycolysis and 2 in the Krebs cycle, a total of 4.
Step 2: Calculation
ATP from the ETS \(=38-4=34\).
Step 3: Check
There are 10 NADH (2 in glycolysis, 2 in the link reaction, 6 in the Krebs cycle) and 2 \(\text{FADH}_2\).
Using 3 ATP per NADH and 2 per \(\text{FADH}_2\), \(30+4=34\).
Final Answer:
34 ATP molecules are produced through the ETS. \[ \boxed{\text{(D) }34} \]
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