the differences between amino acids are in the?

A: side groups
B: hydrogen atoms

i think its A

I'm pretty sure it's A.

The differences between amino acids are primarily found in their side groups, also known as R groups. These side groups are attached to the central carbon atom (known as the alpha carbon) in an amino acid molecule. The side groups can vary in composition, size, and charge, which leads to the diversity of amino acids.

To understand the differences between amino acids, you can examine the structure of each amino acid individually. Amino acids consist of a central alpha carbon atom, a hydrogen atom, an amino group (NH2), a carboxyl group (COOH), and the variable side group (R group). It is the R group that differentiates one amino acid from another. The R group can range from a single hydrogen atom (in the simplest amino acid, glycine) to complex structures consisting of hydrocarbons, functional groups, or even aromatic rings.

By analyzing the specific structure and composition of the R group, you can determine the differences between amino acids and their corresponding properties, such as hydrophobicity, hydrophilicity, charge, and reactivity.