Question

select all that apply
what functional groups are found at the n - terminus and the c - terminus of a polypeptide?
□ a phosphate group is at the n - terminus.
□ a carboxyl group is at the c - terminus.
□ a chloride group is at the c - terminus.
□ a methyl group is at the c - terminus.
□ an amino group is at the n - terminus.
□ a hydroxyl group is at the n - terminus.

Explanation:

Polypeptides have an amino group ($-NH_2$) at the N - terminus and a carboxyl group ($-COOH$) at the C - terminus. This is due to the nature of amino - acid linkages in polypeptide chains. Amino acids are joined by peptide bonds, and the free ends retain these functional groups.

Answer:

B. A carboxyl group is at the C - terminus, E. An amino group is at the N - terminus