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Transcription and Regulation

Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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

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

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

multisubunit enzymes
highly glycosylated in their active forms
only active inside the cell
interchangable with DNA polymerases

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Transcription and Regulation
RNA polymerase holoenzyme initiates transcription which involves

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

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

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

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Transcription and Regulation
Transcription factors are

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

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