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The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this?

complementarity
nonsense codons
universality
degeneracy

Respuesta :

Answer:

Degeneracy

Explanation:

  • There are 4 nucleotide  bases and they can form a lot of different codons -  about 64 different codons
  • There are only 20/21 amino acids, not enough for each of the codons

As a result, codons have to "double up" and share amino acids because there is only a limited number of these that they can code for  

luisvaschetto

The feature of the genetic code that explains why AUC and AUA codons in mRNA both specify isoleucine is DEGENERACY.

In mRNA, each triplet of nucleotides or 'codon' specifies one single amino acid during translation in the ribosomes.

In consequence, there are 64 different codons (4³ = 64 possible combinations), however, there are only 20 amino acids.

It occurs because a single transfer RNA (tRNA) specific for a particular amino acid may respond to multiple codons in the mRNA sequence.

Of these 64 codons, 61 codons encode amino acids, while the remaining three codons encode stop signals (i.e., three codons are stop codons).

Therefore, the genetic code is said to be degenerate because there are amino acids codified by two or more different mRNA codons.

In conclusion, the feature of the genetic code that explains why AUC and AUA codons in mRNA both specify isoleucine is DEGENERACY.

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https://brainly.com/question/14002205?referrer=searchResults

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