Which One of the Following is Not a Component of Each

Question

Which one of the following is not a component of each monomer used to make proteins?
A) a phosphorous atom, P
B) a side chain, R
C) a carboxyl group, COOH
D) an amino functional group, NH2

Accepted Answer

A phosphorous atom (P) is not a component of each monomer used to make proteins. Proteins are made up of amino acid monomers, which consist of an amino group (NH2), a carboxyl group (COOH), and a unique side chain (R), but they do not contain phosphorous atoms.