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bio069 - 77 Inaprolraryotic operon um._f.3...

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Unformatted text preview: 77. Inaprolraryotic operon, - um. '_.»-.'_f_ .3 _ particularsubstance. Thisisae nu» a. negative transcriptional " ' —[email protected] positive transcriptional c. catabolite repression . _ d. induction -‘ - ‘. e. derepression ‘ 2a 78. Which is responsible for the transcription of tRNAs in eukaryotes? a. RNA polymerase I b. RNA polymerase II ——§© RNA polymerase III d. tRNA polymerase e. RNA synthetase * .4 .‘a; A,BandCisenhancedinthepzesenceofa 79. The eukaryotic TATA box is directly bound by a factor known as: af TBF 113‘ TBP c. TAF d. TPP e. TAT 80. Quenching occurs when: a. a repressor and activator compete for the binding of the same enhancer sequence _._._.;~b. a repressor binds to and blocks the DNA-binding region of an activator c. a repressor binds to and blocks the activation domain of an activator d. both a and b ©bothbandc 31. Most transcriptional activator proteins in eukaryotes function in the cell as: a. monomers —-'@ dimers c. trimers d. tetramers e. pentamers 82. Which is generally true of eukaryotic transcriptional regulation? a; activators and repressors bind to the promoter while basal factors bind to the enhancers - basal factors bind to the promoter, while activators and wars bind to the enhancers . activators bind to the promoter while basal factors and repressors bind to the enhancers d. repressors bind to the promoter while basal factors and activators bind to the enhancers e. activators and basal factors bind to the promoter while repressors bind to the enhancers Page 18 of 22 ...
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