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 Co-A acts as a substrate for all the enzymes except: 
Select and explain. 
A. HMG-CoA synthase, B. Malic enzyme, C. Malonyl CoA synthetase, D. Fatty acid synthetase
B: Malic enzyme
Answer: B: Malic enzyme 
Explanation: None