Answer:
the amino groups
Explanation:
Amino acids are monomers of proteins. They have two functional groups and are said to be bifunctional. These functional groups are:
>>>>>amino group (-NH₂)
>>>>>carboxyl group (-COOH)
Amino acids have a dipolar ion structure or zwitterion. It shows this structure in aqeous solutions.
It is the functional groups that accounts for the physical and chemical properties of amino acids.
Amino acids have the following physical properties:
>They have a crystalline nature
>Have high solubility with a high melting point
Amino acids are amphoteric in nature and it they react with both an acid and base.
These amino acids combines to form giant protein molecules.
