A) Hydrogen bonds
B) Phosphodiester bond
C) Covalent bond
D) Disulphide bridges
Correct Answer: D
Solution :
Insulin is a hormone consisting of 2 polypeptide chains. Each chain is composed of a specific sequence of amino acid residues connected by peptide bonds. In humans, chain A has 21 amino acids, and chain B has 30 amino acids. Post-translational modifications result in the connection of these two chains by disulpide bridges.
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