Question

Which of the following are typical categorizations of the side (R) groups of amino acids:

A. Hydrophobic, Hydrophilic, Acidic, Basic.
B. Aromatic, Aliphatic, Polar, Nonpolar.
C. Primary, Secondary, Tertiary, Quaternary.
D. Alpha helix, Beta sheet, Random coil, Turns.

Answer 1

Amino acids can be classified based on the characteristics of their distinctive side chains as nonpolar, polar but uncharged, negatively charged, or positively charged. For example, amino acids such as valine, methionine, and alanine have nonpolar or hydrophobic side chains, while amino acids such as serine, threonine, and cysteine have polar and hydrophilic side chains.

Step-by-step explanation:

Amino acids can be classified based on the characteristics of their distinctive side chains as nonpolar, polar but uncharged, negatively charged, or positively charged. For example, amino acids such as valine, methionine, and alanine have nonpolar or hydrophobic side chains, while amino acids such as serine, threonine, and cysteine have polar and hydrophilic side chains. Amino acids like lysine and arginine have positively charged side chains and are known as basic amino acids.