How much ATP does the Krebs cycle produce?

Sourav PanApril 18, 2025

Answered

In one complete turn of the Krebs cycle, 1 molecule of GTP (or ATP) is produced directly through substrate-level phosphorylation. Additionally, the cycle generates 3 NADH and 1 FADH₂, which subsequently donate electrons to the electron transport chain, indirectly producing ATP. 3 NADH yield about 7.5 ATP (3 × 2.5 ATP) and 1 FADH₂ yields about 1.5 ATP. Combined, this results in approximately 10 ATP equivalents per cycle turn. Since two acetyl-CoA molecules are produced from one glucose, total ATP production per glucose via the Krebs cycle is about 20 ATP equivalents.

Did this page help you?

Start Asking Questions Cancel reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Quiz Leaderboard

1st

Meenakshi

Score: 100%

Questions: 20

2nd

Debabrata

Score: 100%

Questions: 20

3rd

BandzzzzTheONESIMELANE

Score: 95%

Questions: 20

4th

Sourav

Score: 90%

Questions: 20

5th

Nischal

Score: 90%

Questions: 10

6th

Priyanka

Score: 90%

Questions: 10

7th

OTLOTLENG

Score: 70%

Questions: 10

8th

Martin

Score: 65%

Questions: 20

9th

Meenakshi

Score: 60%

Questions: 50

10th

Meenakshi

Score: 60%

Questions: 50

Click "Create Mock Test" to start a quiz.
Select categories and the number of questions, then click "Submit" to begin.
After completing the quiz, enter your name and email, then click "Submit" to view your score.
Your score is shown as a percentage (e.g., 5 correct out of 10 is 50%).
The leaderboard displays your name, score percentage, and total questions answered.

Click here to Create Mock Test