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Transcription and Regulation

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

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

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Transcription and Regulation
The nucleons of eukaryotic cell has

RNA polymerase III
RNA polymerase I
all of these
RNA polymerase II

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Transcription and Regulation
Transcription of each set of rRNA genes by RNA polymerasel produces

a single 28S rRNA precursor molecule
a single 45S rRNA precursor molecule
a single 5S rRNA precursor molecule
a single 18S rRNA precursor molecule

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Transcription and Regulation
The binding of lac repressor to DNA could be considered to be analogous to

competitive inhibition of an enzyme
mixed-type inhibition of an enzyme
uncompetitive inhibition of an enzyme
allosteric effects in enzyme regulation

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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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

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

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