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Transcription and Regulation

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

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

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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Transcription and Regulation
The nucleons of eukaryotic cell has

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

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Transcription and Regulation
RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________

replication, DNA polymerase
transcription, DNA polymerase
translation, RNA polymerase
transcription, RNA polymerase

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Transcription and Regulation
Upstream regions which are essential for correct transcription are called

enhancers
start codons
promoters
transcription factors

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