Question

In the Krebs cycle, how is citric acid formed?(1 point)ResponsesPyruvic acid molecules are broken down by an acetyl group.Pyruvic acid molecules are broken down by an acetyl group.Acetyl-CoA joins with a large molecule called oxaloacetic acid.Acetyl-CoA joins with a large molecule called oxaloacetic acid.Enzymes combine hydrogen ions, oxygen, and electrons.Enzymes combine hydrogen ions, oxygen, and electrons.Carbon dioxide bonds with a chain of coenzyme A.

Answer 1

Citric acid is formed in the Krebs cycle when acetyl-CoA joins with a large molecule called oxaloacetic acid. This combination produces citrate, which is another name for citric acid. Therefore, the correct response is:

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