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There are sixty-one mRNA codons that specify an amino acid, but only forty-five tRNAs. This is best explained by the fact that

Sagot :

Oseni

Answer:

See the answer below

Explanation:

The phenomenon is best explained by the fact that the genetic codes are degenerates. In other words, more than one codon can specify for the same amino acid being carried by the tRNA.

The base-pairing rule between the third nucleotide of a codon and that of the anticodon on the tRNAs loosens off. For example, GUU, GUC, and GUA all specify for the amino acid valine while GCU, GCC, and GCA all specify for alanine.

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