The Krebs cycle is a true cycle because the starting material is regenerated. Which four-carbon compound must be available to combine with Acetyl-CoA?
Q1. The Krebs cycle is a true cycle because the starting material is regenerated. Which four-carbon compound must be available to combine with Acetyl-CoA?
Answer: Oxaloacetate
Explanation: Oxaloacetate must be regenerated to accept the next Acetyl-CoA. Option B is incorrect because citrate is the first product, not the regenerator.