g Use the information gathered in the Nature Article Expanding the Genetic Code in the Laboratory to answer the question. How many amino acids are currently known to be encoded by the standard genetic code in at least some organisms?

Answer: 20 amino acids

Explanation:

The triplet nature of the genetic code make for a possible 64 codons: 61 code for amino acids present in most polypeptide chains while the remaining 3 are special-sense codons, since they only signal for the termination of the polypeptide chain.

Thus, due to the degeneracy of the genetic code, the 64 codons code for 20 amino acids