Question

Why are Amino acids chiral?

Answer 1

Basic amino groups ( $- N{H_2}$ ) and carboxyl groups ( $- COOH$ ) are found in amino acids. Amino acids are the main components of proteins. Amino Acids are chemical molecules that combine to produce proteins and are hence known as the building blocks of proteins.

Complete answer:
An atom with four different groups bound to it in such a way that it has a non-superimposable mirror image is known as a chiral centre. The phrase chirality centre is now referred to as the term chiral centre.
All amino acids except glycine are chiral because they all contain at least one chiral centre. This means glycine is the only amino acid which contains two same groups and two different groups around the central carbon atom, that is, there are two hydrogen atoms, one amino group and one carboxyl group.
A chiral or stereocenter item is described as one that is asymmetric and cannot be superimposed upon its mirror image. Chirality is the term for this characteristic. For example, our hands, legs, and other body parts.
A achiral object is one that is symmetric in nature and may be placed upon its mirror image. For example, a cube, a cone, and so on.
The three-dimensional or spatial configurations of molecules cause chirality.

Note:
The chemical and physical properties of a chiral molecule and its enantiomer are identical (boiling point, melting point, polarity, density). Many of our biological molecules, such as DNA, amino acids, and sugars, turn out to be chiral compounds.