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Home Q & A Board Biology-Related Homework Help Cell Biology
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davesch davesch
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11 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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#1
11 years ago
The UAG sequence does not carry an amino acid, meaning there are 24-3 = 21 bases carrying amino acids. Since codons come in groups of 3 bases, the polypeptide will have 21/3 = 7 amino acids, starting with methionine (for the AUG codon).
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#2
11 years ago
Although 7 amino acids is probably the answer (from the previous answer) technically this is not correct. Assuming the mRNA has already been spliced, processed and ready to go, there are additions to the mRNA that make it longer. That is, there are regions of the mRNA that do not code for the amino acids. For instance, the poly A tail and the CpG cap. These are two classic examples of mRNA processing before translation occurs.

Regardless, I would go with the answer 7. But keep this info in mind
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