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Transcription and Regulation

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

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

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Transcription and Regulation
Rho-dependent termination of transcription in E. coli

requires ATP
both (a) and (b)
requires about 50 nucleotides of uncomplexed mRNA
removes mRNA and holoenzyme from the DNA

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Transcription and Regulation
Transcription results in

Okazaki fragments
messenger RNA
an amino acid chain
complementary DNA

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Transcription and Regulation
In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

Shine Dalgarno region
TATA box
CATT
SV40 region

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Transcription and Regulation
The closed complex at bacterial promoters is

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

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Transcription and Regulation
In prokaryotes, transcription is

terminated by a protein called rho
terminated by a start codon
terminated by a poly A sequence
terminated by the stop codon

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