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: Unknown
Pyruvate can be a substrate for - 
Select and explain. 
A. Fatty acid synthesis, B. TCA cycle, C. Cholesterol synthesis, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e. All of the abovePyruvateo It is a degradation product of glucose (glycolysis) and glycogenic amino acids. It can be converted to glucose (gluconeogenesis through oxaloacetate) and acetyl CoA (therefore all biosynthetic products which arise from acetyl CoA)