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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 factors are

CATT boxes
TATA boxes
promoters
proteins which bind to DNA and regulate transcription

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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.
start codons.
Shine Dalgarno sequences.
promoters.

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Transcription and Regulation
Immediately after transcription

a methylated guanine cap is added to the 51 end of the transcript
a methylated guanine cap is added to the 31 end of the transcript
both (a) and (b)
a poly adenylation signal is added

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Transcription and Regulation
The closed complex at bacterial promoters is

not affected by activator proteins
bound more tightly when repressors are present
in equilibrium with free RNA polymerase and the promoter
not affected by promoter mutations

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Transcription and Regulation
The nucleons of eukaryotic cell has

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

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