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Transcription and Regulation

Transcription and Regulation
Enhancers are regions that

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

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Transcription and Regulation
The RNA polymerases that transcribe bacterial DNA are

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

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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
bound more tightly when repressors are present
not affected by promoter mutations

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Transcription and Regulation
RNA polymerase in prokaryotes has a removable

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

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

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

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Transcription and Regulation
Transcription results in

an amino acid chain
complementary DNA
messenger RNA
Okazaki fragments

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