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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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Transcription and Regulation
Transcription by E. coli polymerase occurs in

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

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

replication bubble
a translation bubble
transcription bubble
none of these

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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 I
RNA polymerase II
RNA polymerase III

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

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

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Transcription and Regulation
Enhancers are regions that

are adjacent to the TATA box
are CAT box binding proteins
modulate transcription
bind RNA polymerase

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