In the Krebs cycle, how is citric acid formed?(1 point) Responses Pyruvic acid molecules are broken down by an acetyl group. Pyruvic acid molecules are broken down by an acetyl group. Enzymes combine hydrogen ions, oxygen and electrons. Enzymes combine hydrogen ions, oxygen and electrons. 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.
