Discussion
Home ‣ Biochemistry ‣ Transcription and Regulation Comments
- Question
Transcription factors are
Options- A. promoters
- B. proteins which bind to DNA and regulate transcription
- C. TATA boxes
- D. CATT boxes
- Correct Answer
- proteins which bind to DNA and regulate transcription
- 1. RNA polymerase in prokaryotes has a removable
Options- A. alpha subunit
- B. beta subunit
- C. both (a) and (b)
- D. sigma subunit Discuss
- 2. Immediately after transcription
Options- A. a methylated guanine cap is added to the 51 end of the transcript
- B. a methylated guanine cap is added to the 31 end of the transcript
- C. both (a) and (b)
- D. a poly adenylation signal is added Discuss
- 3. Upstream regions which are essential for correct transcription are called
Options- A. enhancers
- B. start codons
- C. promoters
- D. transcription factors Discuss
- 4. The genetic code is
Options- A. universal
- B. universal except for rare exceptions in mitochondria and some protozoa
- C. species-specific
- D. kingdom-specific Discuss
- 5. Crick demonstrated that the genetic code involved three bases and suggested that the code was degenerated. What experimental technique Crick conducted to suggest genetic code degeneration?
Options- A. Gel electrophoresis
- B. Density gradient centrifugation
- C. Frameshift mutagenesis
- D. Restriction digests of the rII gene Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Transcription and Regulation problems
Search Results
Correct Answer: sigma subunit
Correct Answer: a methylated guanine cap is added to the 51 end of the transcript
Correct Answer: promoters
Correct Answer: universal except for rare exceptions in mitochondria and some protozoa
Correct Answer: Frameshift mutagenesis
Correct Answer: Both (b) and (c)
Correct Answer: both (a) and (b)
Correct Answer: at least two distinct domains of protein structure, a DNA binding domain and an activation domain
Correct Answer: in equilibrium with free RNA polymerase and the promoter
Correct Answer: transcription bubble
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