Question

In the Krebs cycle, how is citric acid formed?(1 point)
Responses

Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.

Carbon dioxide bonds with a chain of coenzyme A.
Carbon dioxide bonds with a chain of coenzyme A.

Enzymes combine hydrogen ions, oxygen, and electrons.
Enzymes combine hydrogen ions, oxygen, and electrons.

Pyruvic acid molecules are broken down by an acetyl group.

Answer 1

Citric acid is formed in the Krebs cycle when **Acetyl-CoA joins with a large molecule called oxaloacetic acid.** This reaction produces citric acid (or citrate) and is the first step in the Krebs cycle.