A transcription unit that is 8000 nucleotides long results in an active protein consisting of approximately...
A transcription unit that is 8000 nucleotides long results in an active protein consisting of approximately 400 amino acids. Describe two different processes that jointly of separately explain this observation.
Homework Answers
The length of the transcription unit
= 8000 nucleotides
Length of protein = 400 amino acids
i.e. the length of the coding sequence = 400 X 3 = 1200
nucleotides
The disparity in the length of the genomic sequence and the coding
sequence can be due to two phenomena.
1. The mRNA sequence contains 5'-UTR and 3'-UTR sequences which do
not get translated
2. The primary mRNA contains introns which are removed by
splicing
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