In eukaryotes, there are codons that specify amino acids. (0.5 pt.)

(a) 21
(b) 24
(c) 61
(d) 64
(e) 60

C : 61

Explanation:

The three-letter nature of codons means that the four nucleotides found in mRNA; A, U, G, and C which produces a total of 64 different combinations. Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals/codons, which trigger the end of protein synthesis.

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an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme