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posted by  Wilz on 10/9/2008 12:55:43 AM  |  status: Live  

mRNA

Course Textbook Chapter Problem
Genetics N/A N/A N/A
Question Details:
A certain gene in bacteria produces 2 mRNA transcripts of differing lengths. Which is the most likely explanation for the 2 RNAs?
A) Two initiator codons             B) RNA polymerase lacks the helicase activity
C) Bidirectional transcription      D) Presence of Poly-A tail 
                     E) Two different promoters
 
Can you please explain?  I will rate.  thx

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posted by chakku on 10/9/2008 4:31:48 AM  |  status: Live
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Response Details:

The reason is bidirectional transcription which results in both sense and antisense strand transcription producing two
 m-rna transcripts. Now the reason of them being unequal in length is difference in position of start and stop codon in sense and anti sense strand.
Thus the reason are C and E.

I hope it helps. enjoy.


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