Question

amino acids are named after two of their functional groups: the amino group (nh2), which acts like a base, and the carboxyl group (cooh), which acts like an acid. amino acids also contain a third functional group, often called the r group. in alanine, the r group is a methyl group (ch3). in serine, the r group is a methyl alcohol (-ch2oh). how do both the similarity and differences among amino acids allow them to form macromolecules with a wide variety of properties?

Explanation:

All amino - acids have common amino and carboxyl groups which allow them to form peptide bonds through dehydration synthesis, creating long chains (polypeptides). The differences in the R - groups give each amino - acid unique chemical properties such as polarity, charge, and size. These unique R - group properties influence the folding of the polypeptide chain into specific 3 - D structures, which in turn determine the function of the macromolecule.

Answer:

The common amino and carboxyl groups enable amino - acids to link together to form macromolecules, while the different R - groups endow the macromolecules with a wide variety of properties due to their distinct chemical characteristics that affect the folding and function of the macromolecules.