Which amino acid has an Rgroup that bums covalent bond with

Which amino acid has an R-group that bums covalent bond with polypeptide backbones, thereby restricting the flexibility of the polypeptide? To what category does this amino acid belong? Which one is most soluble in water. Which arrow in the polypeptide shown point to peptide bond? To which end of the polypeptide would a new amino acid during polymerization?

Solution

Q.No 1

C. Cysteine

Q.No 2

b. Polar Uncharged

Q.No 3

3.

Q.No 4

c. Pepdide bond C=O-N-H

Q.No 5

b. The right end