Question

which monomer includes an r - group, which is individual for each one. amino acid fatty acid tail monosaccharide nucleotide

Explanation:

Amino acids are the monomers of proteins. Each amino acid has a central carbon atom bonded to an amino group (\(-NH_2\)), a carboxyl group (\(-COOH\)), a hydrogen atom, and an R - group. The R - group is what makes each amino acid unique. Fatty acid tails are part of lipids (such as in triglycerides or phospholipids) and do not have the general structure with an R - group as described. Monosaccharides are the monomers of carbohydrates and have a general formula \(C_nH_{2n}O_n\) and do not have an R - group in the sense of amino acids. Nucleotides are the monomers of nucleic acids (DNA and RNA) and consist of a nitrogenous base, a pentose sugar, and a phosphate group, not an R - group like amino acids.

Answer:

Amino Acid