A homopolymer has only one type of building block called monomer repeated ‘n’ a number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of
a. 20 types of monomers
b. 40 types of monomers
c. 30 types of monomers
d. only one type of monomer
Going by facts, Proteins consist of 20 types of monomers. Only 20 amino acids are standard and are usually used in the formation of proteins during the process of translation. Hence, Option (a) is the correct answer.