a question needing an answer

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a question needing an answer

Post by Drshaalan » Sat Mar 07, 2009 6:05 pm

we know that nitrogenous bases are four ( adnine- thyamine-cytosin-guanine) each three of them translate to the 21th amino acids and the 4 N-bases power 3 (the codon of each amino acid) equal 64 not 21

so my question is what is the role of this extracodon???? :roll:

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Post by MrMistery » Sat Mar 07, 2009 6:33 pm

well if you only had 21 codons (what's your 21st codon by the way, selenocysteine?) and the rest up until 64 were stop codons, then you would have a lot of nonsense mutations. being degenerate makes a lot of mutations silent.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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