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Author Question: There are 61 mRNA codons that specify an amino acid, but only 45 tRNAs. This is (Read 696 times)

Yolanda

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on: Jun 25, 2013
There are 61 mRNA codons that specify an amino acid, but only 45 tRNAs. This is best explained by the fact that
A) some tRNAs have anticodons that recognize four or more different codons.
B) the rules for base pairing between the third base of a codon and tRNA are flexible.
C) many codons are never used, so the tRNAs that recognize them are dispensable.
D) the DNA codes for all 61 tRNAs but some are then destroyed.
E) competitive exclusion forces some tRNAs to be destroyed by nucleases.


coco

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Reply #1 on: Jun 27, 2013
It's B. Have a nice day!


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Yolanda

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Reply #2 on: Jul 6, 2013
Thanks :D


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Modifications that occur at the ends of mRNA in eukaryotic cells. Modifications that occur at the ends of mRNA in eukaryotic cells.
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Acid Precipitation Acid Precipitation
Activation of amino acids for incorporation into proteins Activation of amino acids for incorporation into proteins
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