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Home ‣ Biochemistry ‣ Transcription and Regulation Comments
- Question
The closed complex at bacterial promoters is
Options- A. in equilibrium with free RNA polymerase and the promoter
- B. not affected by promoter mutations
- C. bound more tightly when repressors are present
- D. not affected by activator proteins
- Correct Answer
- in equilibrium with free RNA polymerase and the promoter
- 1. The transcriptional regulatory proteins in eukaryotes which induce transcription usually have
Options- A. at least two distinct domains of protein structure, a DNA binding domain and an activation domain
- B. at least two distinct domains of protein structure and a DNA binding domain
- C. at least one distinct domains of protein structure, a DNA binding domain and an activation domain
- D. none of these Discuss
- 2. Rho-dependent termination of transcription in E. coli
Options- A. requires ATP
- B. requires about 50 nucleotides of uncomplexed mRNA
- C. both (a) and (b)
- D. removes mRNA and holoenzyme from the DNA Discuss
- 3. Which of the following conditions would cause the release of the lac repressor protein from the lac operator site on DNA?
Options- A. Presence of glucose in the growth media
- B. Presence of lactose in the growth media
- C. Presence of IPTG (isopropyl thiogalactoside) in the growth media
- D. Both (b) and (c) Discuss
- 4. Transcription factors are
Options- A. promoters
- B. proteins which bind to DNA and regulate transcription
- C. TATA boxes
- D. CATT boxes Discuss
- 5. RNA polymerase in prokaryotes has a removable
Options- A. alpha subunit
- B. beta subunit
- C. both (a) and (b)
- D. sigma subunit Discuss
- 6. The complex of RNA polymerase, DNA template and new RNA transcript is called
Options- A. transcription bubble
- B. replication bubble
- C. a translation bubble
- D. none of these Discuss
- 7. The binding of lac repressor to DNA could be considered to be analogous to
Options- A. competitive inhibition of an enzyme
- B. mixed-type inhibition of an enzyme
- C. uncompetitive inhibition of an enzyme
- D. allosteric effects in enzyme regulation Discuss
- 8. Enhancers are regions that
Options- A. bind RNA polymerase
- B. are adjacent to the TATA box
- C. are CAT box binding proteins
- D. modulate transcription Discuss
- 9. Transcription results in
Options- A. an amino acid chain
- B. messenger RNA
- C. complementary DNA
- D. Okazaki fragments Discuss
- 10. Which of the following is necessary for transcription to occur?
Options- A. DNA molecule
- B. RNA polymerase
- C. DNA polymerase
- D. Both DNA & RNA polymerase Discuss
Transcription and Regulation problems
Search Results
Correct Answer: at least two distinct domains of protein structure, a DNA binding domain and an activation domain
Correct Answer: both (a) and (b)
Correct Answer: Both (b) and (c)
Correct Answer: proteins which bind to DNA and regulate transcription
Correct Answer: sigma subunit
Correct Answer: transcription bubble
Correct Answer: competitive inhibition of an enzyme
Correct Answer: modulate transcription
Correct Answer: messenger RNA
Correct Answer: Both DNA & RNA polymerase
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