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Transcription and Regulation

Transcription and Regulation
Each tRNA molecule has a cloverleaf secondary structure consisting of

four stem loops
three stem loops
two stem loops
either (a) or (b)

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Transcription and Regulation
Transcription begins

none of these
downstream from the start codon
at the start codon
upstream from the start codon

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

beta subunit
sigma subunit
both (a) and (b)
alpha subunit

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Transcription and Regulation
In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is

none of these
RNA polymerase III
RNA polymerase II
RNA polymerase I

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Transcription and Regulation
The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed

promoters.
oriC regions.
Shine Dalgarno sequences.
start codons.

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

three phases known as initiation, elongation and termination
four phases known as initiation, propagation, elongation and termination
two phases known as initiation and termination
None of these

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