Write the formula of an amino acid and identify functional groups in it.

General formula of an amino acid: NH₂-CHR-COOH

Functional groups:

Amino group (-NH₂) → Makes amino acids basic

Carboxyl group (-COOH) → Makes amino acids acidic

R group (Side chain) → Determines the type of amino acid

For example, the amino acid glycine has the formula NH₂-CH₂-COOH.

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