Answer:
The correct option is: Isoleucine
Step-by-step explanation:
Peptides are the biological molecules containing amino acids which are linked together by peptide bonds. A polypeptide is a peptide chain in which more than 20 amino acids are linked together by peptide bond.
All polypeptide chains have a N-terminal and a C-terminal.
The N-terminal of a polypeptide is also known as the amino terminal. The N-terminal has a free amine group, which is generally on the left hand side of the polypeptide chain.
Therefore, the N-terminal or the amino terminal of the given polypeptide is Isoleucine (I).