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.

multiply it by 5 in order for you to understand i cant give an exact answer.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.