Question

A homopolymer has only one type of building block called monomer repeated ‘n’ number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of

• A. 20 types of monomers
• B. 30 types of monomers
• C. 40 types of monomers
• D. only one type of monomer

Answer 1

The correct option is A 20 types of monomers

Proteins

• Proteins are macromolecules having one or more polypeptides which are made by the polymerisation of amino acids (monomeric units).
• Only 20 amino acids are standard and are usually used in the formation of proteins during the process of translation.
• Hence, each protein is a heteropolymer which can be constituted by 20 types of amino acids.

Final answer a. 20 types of monomer