The Krebs cycle turns three times for each glucose molecule.Group startsTrue or FalseTrue, unselectedFalse, unselected

To determine whether the statement is true or false, we need to analyze the Krebs cycle (also known as the citric acid cycle) and its relation to glucose metabolism.

Understanding the Krebs Cycle

1. Glucose Breakdown: Each glucose molecule (C6H12O6) undergoes glycolysis, which converts it into two molecules of pyruvate (C3H4O3).
2. Conversion to Acetyl-CoA: Each pyruvate is then converted into acetyl-CoA (C2H3O-CoA) before entering the Krebs cycle. This conversion occurs twice for each glucose molecule, yielding two acetyl-CoA.
3. Krebs Cycle Turns: The Krebs cycle itself operates once for each acetyl-CoA molecule. Since there are two acetyl-CoA molecules generated from one glucose molecule, the Krebs cycle turns twice, not three times.

Conclusion

Given that the Krebs cycle turns twice for each glucose molecule, the statement claiming it turns three times is False.

Final Answer

False