Question

The following structure is drawn in an unconventional manner.

(a) Label the N terminus and the C terminus.

(b) Label the peptide bonds.

(c) Identify and label each amino acid present.

(d) Give the full name and the abbreviated name

Short answer

Peptide bonds are denoted by asterisk (*)

Step-by-step solution

Step-1: Explanation to part (a)

N-terminus is referred to as the free amine end of the peptide chain and free carboxylic acid end is referred to as the C-terminus. Both the termini are different from each other with respect to chemical properties.

Step-2: Explanation to part(b)

Peptide bonds are formed when the amine group of one amino acid forms bond with carbonyl carbon of another amino acid. A chain of amino acids is known as polypeptide.

Peptide bonds are denoted with asterisks (*)

Step-3: Explanation to part(c)

Amino acids are building blocks of protein molecules. Proteins are broken or digested down into smaller molecules known as amino acids.

Step-4: Explanation to part (d)

Full name of the given polypeptide is glycylglutaminylisoleucinamide. Its abbreviated name is Gly-Gln-Ile. Naming of the polypeptide is done from N-terminus to C-terminus.