This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Acetyl CoA is used for synthesis of following, except : 
Select and explain. 
A. Carbohydrates, B. Ketone bodies, C. Cholesterol, D. Non-ketogenic amino acids only
D: Non-ketogenic amino acids only
Answer: D: Non-ketogenic amino acids only 
Explanation: Acetyl-CoA is the third branch point of primary metabolic control, and coordinates carbohydrate, ketone, and fat/lipid pathways.Acetyl-CoA is the product of carbohydrate, protein, and lipid catabolism.Acetyl-CoA is a substrate for the citric acid cycle and can be oxidized to generate energy. It is not used for the synthesis of non ketogenic amino acids only. Ref:Valencik M.L., Mastick C.C. (2012). Chapter 10. Metabolism and Vitamins/Minerals. In L.W. Janson, M.E. Tischler (Eds), The Big Picture: Medical Biochemistry.