Question

all amino acids have a central carbon with four components attached to it. which component gives each amino acid unique characteristics?
r group
carboxyl group
hydrogen atom
group with nitrogen and 2 hydrogen atoms

Explanation:

Amino acids have a central carbon bonded to an amino group (group with nitrogen and 2 hydrogen atoms), a carboxyl group, a hydrogen atom, and an R - group. The R - group varies among different amino acids and gives each its unique chemical and physical characteristics.

Answer:

A. R group