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Transcription and Regulation

Transcription and Regulation
The complex of RNA polymerase, DNA template and new RNA transcript is called

none of these
replication bubble
a translation bubble
transcription bubble

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Transcription and Regulation
In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

CATT
Shine Dalgarno region
SV40 region
TATA box

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

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

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

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

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Transcription and Regulation
Immediately after transcription

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

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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