Question

How many naturally occurring amino acids are there?

Answer 1

There are 20 naturally occurring amino acids that are commonly found in proteins. These 20 amino acids serve as the building blocks of proteins in living organisms. They are alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. Each amino acid has a unique chemical structure and side chain (R group) that contributes to its specific properties and functions in biological systems.