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26. In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is
A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. none of these
27. The nucleons of eukaryotic cell has
A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. all of these
28. Upstream regions which are essential for correct transcription are called
A. enhancers
B. start codons
C. promoters
D. transcription factors
29. Transcription of each set of rRNA genes by RNA polymerasel produces
A. a single 45S rRNA precursor molecule
B. a single 5S rRNA precursor molecule
C. a single 18S rRNA precursor molecule
D. a single 28S rRNA precursor molecule
30. The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed
A. start codons.
B. oriC regions.
C. Shine Dalgarno sequences.
D. promoters.
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