This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
Carnitine is made-up of: 
Select and explain. 
A. Leusine, B. Lysine, C. Lysine & methionine, D. Arginine
C: Lysine & methionine
Answer: C: Lysine & methionine 
Explanation: Ans. (c) Lysine & methionineRef: Harpers Biochemistry, 30th edn. pg. 223-24* Carnitine is a quaternary ammonium compound biosynthesized from the amino acid lysine and methionine.* It is required for the transport of fatty acids from the intermembraneous space in the mitochondria, into the mitochondrial matrix during the breakdown of lipids for the generation of metabolic energy.