Answer: They use enzymes.
Explanation:
Cells employ enzymes to drive and speed up their chemical reactions without being used up themselves. They are the only macromolecular biological catalysts that can start a reaction using the smallest available heat energy, thus overcoming the issue of needing high activation energy. Enzymes work by converting specific substrates to required product by binding them to their active site.
The parents had two recessive traits for a bent thumb.
The maximum number of amino acid would be 4.
***Remember, 3 codon equals 1 amino acid. It just like 12 divided by 3***
