Question

How is the pyruvate that is made during one step of cellular respiration used by another step in the process?

• A. To make acetyl-CoA for the Krebs cycle
• B. To accept electrons from electron transport chains
• C. To move hydrogen ions across a membrane
• D. To make water at the end of glycolysis

Answer 1

The pyruvate that is made during one step of cellular respiration is used by another step in the process to make acetyl-CoA for the Krebs cycle. This is represented by option A. During cellular respiration, pyruvate is produced as the end product of glycolysis. Pyruvate then enters the mitochondria, where it is converted into acetyl-CoA through a process called pyruvate decarboxylation. Acetyl-CoA then enters the Krebs cycle, where it is further broken down to produce ATP, NADH, and FADH2.

Step-by-step explanation: