Question #b9b94

1 Answer

It works with Codons:

Explanation:

4 different bases: A, C, G and T in DNA.
Translated in Messenger RNA: U, G, C and A.

3 bases for 1 AA,

#rarr 4 xx 4 xx 4 = 64" "# possible combinations.

3-base sequences are called CODONS, and are the info that the ribosome needs to incorporate the right AA.

The AA's are brought to the ribosome by tRNA's (Transfer-RNA's)

The AA that they bring to the ribosome corresponds with the (anti-)codon they carry at their front...

Codon-table :

https://bilingualbiology11a.blogspot.ro/2014/05/topic-12-from-dna-to-proteins.html

3 is the minimum required for 20 different possibilities:

  • #2# bases:

#4xx4 = 16#, this is not enough choice for #20# AA's;

  • #4# bases:

Superfluous, not needed...