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tommyq tommyq
wrote...
11 years ago
how does an mRNA molecule specify where the polypeptides it encodes should begin? How does it specify where the polypeptide should end?
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wrote...
11 years ago
they have "start" and "stop" sequence (codon) that specifies this.
wrote...
11 years ago
The encoding comes from DNA. On the DNA there are specific sequence of bases that tells where the transcription should start and where it should end. The whole polypeptide chain is encoded on the messenger RNA.
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