How many amino acids are used to make up the all of the proteins in the human body?

Answer: Twenty amino acids

Explanation:

There are four nitrogenous bases that forms base triplets (codons) and code for an amino acid each. These amino acids include

- phenylanine, Tyrosine, Trytophan, serine, threonine, methionine, cysteine, histidine, valine, isoleucine, Leucine, proline, arginine, lysine, aspartate, glutamate, glutamine, Alanine, asparagine and Gycine