Respuesta :
An amino acid consists of three parts which are- carboxyl group, amino group and a side chain.
What is amino acid and what is its structure?
• Amino acids are the building blocks of proteins and proteins in turn are macromolecules that are important for living beings as they help in maintaining structure, function and regulation of body.
• The structure of amino acid consists of a central chiral carbon (-C*), a hydrogen atom (-H), amino group (-[tex]NH_{3}[/tex]), carboxyl group (-COOH) and a side chain (-R)
• The side chain (-R) is what makes up different kind of amino acids. There are 20 types of amino acids.
Therefore, option (d) Carboxyl group, amino group, side chain is correct.
To learn more about amino acids, refer:
https://brainly.com/question/7459905
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