The composition of creatine is:

Ans. (a) Glycine, arginine, methionineRef: Vasudevan Biochemistry, 8th ed. P 269* Creatinine is formed in muscle from creatine phosphate by irreversible, nonenzymatic dehydration and loss of phosphate.* Glycine, arginine, and methionine all participate in creatine biosynthesis.* Synthesis of creatine is completed by methylation of guanidinoacetate by S-adenosylmethionine.