What functional groups will be joined together if alanine and serine molecules combine to form a single molecule?

(a. an amino group and a carbonyl group.)
(b. an amino group and a methyl group.)
(d. a hydrogen atom and a methyl group.)

The correct answer is a an amino group and a carboxyl group.

Explanation:

Alanine and serine are both amino acids.Alanine is a simple amino acids where serine is a hydroxyl amino acids.

      When alanine and serine molecules combine to form a single molecule at that time an amino group and the carboxyl group will be joined together to form a ala-ser peptide linkage.

i believe the answer is a or 1