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Transcription and Regulation

Transcription and Regulation
The nucleons of eukaryotic cell has

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

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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
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
allosteric effects in enzyme regulation
uncompetitive inhibition of an enzyme

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Transcription and Regulation
Which of the following is necessary for transcription to occur?

Both DNA & RNA polymerase
DNA molecule
RNA polymerase
DNA polymerase

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
RNA polymerase holoenzyme initiates transcription which involves

recognition of the -35 sequence only
recognition of the -10 sequence and -35 sequence
recognition of the -10 sequence only
None of these

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