Which of these is the first amino acid in a polypeptide chain?
Q. Which of these is the first amino acid in a polypeptide chain?
A. Serine
B. Valine
C. Alanine
D. Methionine
Answer: Methionine
A. Serine
B. Valine
C. Alanine
D. Methionine
Answer: Methionine