Question

The functional group which is found in amino acid is
(A) $COOH$
(B) $N{H_3}$
(C) $C{H_3}$
(D) Both (A) and (B)

Answer 1

Hint: Amino acids are the bifunctional organic compounds that have more than two groups present on the side chain with carbon as the central atom. The main elements other than carbon in the amino acids are Nitrogen, Oxygen, and Hydrogen.

Complete step by step solution:
Amino acids are the basic unit of protein. Proteins are formed when a long polymer chain of amino acids is formed.
Generally, an amino acid consists of an amine group and a carboxyl group, and other functional groups, depending on the structure of the acid.
The main functional group which is present in amino acids is \[COOH\;\;\] (carboxyl group) and $N{H_3}$ (amine group).
Every amino acid is formed in such a way that it has a central carbon with hydrogen and an R group. It varies for every amino acid.
A single (aliphatic) carbon binds all of these groups. The carbon which gets attached directly to the carboxyl group is given the alpha position, so all the amino acids in proteins are referred to as alpha-amino acids.
The General structure of amino acid is given as:

Hence, Option, ‘(D) Both (A) and (B)’ is the correct answer.

Note: An Amino acid can be identified with the presence of a carboxyl group and an amine group along with an R group. These are classified into acidic, basic, and neutral. It depends upon the number of \[COOH\;\;\] groups and $N{H_3}$ group present in the molecule i.e. if there are more carboxyl groups then the molecule is acidic and if there are more number of amine groups than the carboxyl group then it is basic. Amino acids are also classified as Essential and Non-Essential amino acids. The amino acids that can be produced in the human body are Non-Essential amino acids and those that cannot be produced in the human body are called essential amino acids. These amino acids are needed to be taken through food.