Biochemistry In the citric acid cycle, the reaction which produces succinyl CoA also forms carbon dioxide. The key intermediate enzymic step involves: A The decarboxylation of a hydroxy acid B The decarboxylation of an alpha-ketoacid C The decarboxylation of a beta-ketoacid D The oxidation of a keto group to a carboxylic acid 💡 Explanation In the citric acid cycle, the reaction which produces succinyl CoA also forms carbon dioxide. The key intermediate enzymic step involves: ✓ Correct Answer: B. The decarboxylation of an alpha-ketoacid