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Home Q & A Board Biology-Related Homework Help Cell Biology
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juliem juliem
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12 years ago
How long, in amino acids, would be a polypeptide produced in the translation of a 24-base mRNA molecule which begins with 'AUG' and ending with 'UAG'?
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wrote...
#1
12 years ago
8 amino acids long

the 24 bases would be paired into 8 sets of codons (a codon is three base pairs, and it pairs together with a tRNA which has an anticodon on one side and an amino acid on the other side).

starting with AUG is significant just because that is a "start codon" (which just tells the protein to begin) and the UAG end is an "end codon" that says when the protein/polypeptide chain has ended.
wrote...
#2
12 years ago
I concur with 8.
wrote...
#3
12 years ago
I disagree.  It would be 7 amino acids long.

UAG is a stop codon.  Stop codons do not code for an amino acid: instead, they recruit a release factor to the ribosome.
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