This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipids, Subject name: Biochemistry
First fatty acid to form in fatty acid synthesis: 
Select and explain. 
A. Palmitic acid, B. Stearic acid, C. Oleic acid, D. Pantothenic acid
A: Palmitic acid
Answer: A: Palmitic acid 
Explanation: Ans. A Palmitic acid* Palmitic acid is the most common fatty acid found in animals, plant and microbes.* Excess carbohydrates and proteins are converted to palmitic acid.* Palmitic acid is the first fatty acid synthesized during fatty acid synthesis.* Note: First step in fatty acid synthesis is transfer of acetate units from mitochondrial acetyl CoA to the cytosol.