Discussion
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- Question
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
- Correct Answer
- competitive inhibition of an enzyme
- 1. 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
- 2. 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 Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. Transcription results in
Options- A. an amino acid chain
- B. messenger RNA
- C. complementary DNA
- D. Okazaki fragments Discuss
- 8. 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
- 9. In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as
Options- A. CATT
- B. Shine Dalgarno region
- C. TATA box
- D. SV40 region Discuss
- 10. What is a promoter?
Options- A. A specific sequence of DNA to which a catabolic repressor binds
- B. A specific sequence of DNA to which RNA polymerase binds
- C. A specific DNA sequence to which a restriction endonuclease binds
- D. None of the above Discuss
Transcription and Regulation problems
Search Results
Correct Answer: transcription bubble
Correct Answer: in equilibrium with free RNA polymerase and the promoter
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: modulate transcription
Correct Answer: messenger RNA
Correct Answer: Both DNA & RNA polymerase
Correct Answer: TATA box
Correct Answer: A specific sequence of DNA to which RNA polymerase binds
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