Question

there are 20 amino acids, each with the same base structure. which part of the amino acid structure changes for each amino acid type? (1 point) image of amino acid structure with labels 1 (r), 2 (amino group), 3 (h), 4 (carboxyl group) options: 3- the hydrogen; 1 - the r-group; 4 - the carboxyl group; 2 - the amino group

Explanation:

Amino acids have a common base structure including an amino group (part 2), a carboxyl group (part 4), a hydrogen (part 3), and an R - group (part 1). The R - group (part 1) is the variable region that differs among the 20 amino acids, giving each its unique properties. The amino group (part 2), carboxyl group (part 4), and the hydrogen (part 3) are the same in the base structure of all amino acids.

Answer:

1 - The R - group