Question

the diagram shows the general structure of an amino acid. several different amino acids join together to form a protein. how do any two types of amino acids differ from one another.
general structure of amino acids
amino group - c - carboxyl group - variable group
choose
the number of amino groups in the molecule
the number of carboxyl groups in the molecule
the chemical structure of the r group in the molecule
the number of chemical bonds formed by the central carbon atom

Explanation:

All amino - acids have a common structure with an amino group, a carboxyl group, and a hydrogen attached to a central carbon. The difference between amino - acids lies in the R - group (side chain) which can vary in size, shape, charge, and chemical properties.

Answer:

the chemical structure of the R group in the molecule