Discussion
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- Question
A frameshift mutation occurs in the sigma subunit gene transcribed as part of SPOl early genes. What will be the immediate result?
Options- A. Early genes will not be translated
- B. Middle genes will not be transcribed
- C. The bacterial host will lyse immediately
- D. Infection will proceed as usual
- Correct Answer
- The bacterial host will lyse immediately
- 1. DNA is methylated at
Options- A. AC sequences
- B. TATA sequences
- C. CAAT sequences
- D. CG sequences Discuss
- 2. Which of the following occur in the presence of glucose?
Options- A. lac Z gene expression is increased
- B. cAMP increases
- C. Binding of CAP-cAMP complex to the promoter area decreases
- D. none of the above Discuss
- 3. The lac operon is transcribed in which segments?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 4. Genes which need to be coordinately regulated but are not in operons may be regulated by
Options- A. common transcription factor binding domains
- B. TATA boxes
- C. CAAT regions
- D. GC regions Discuss
- 5. Catabolite activating protein exerts __________ control on transcription of the lac operon genes.
Options- A. positive
- B. negative
- C. may be positive or negative
- D. none of these Discuss
- 6. In the presence of high levels of tryptophan
Options- A. attenuator allows transcription of trp structural genes
- B. attenuator propogates transcription
- C. attenuator terminates transcription
- D. none of the above Discuss
- 7. Which of the following is not a transcription factor?
Options- A. Helix-turn-helix proteins
- B. Zinc finger proteins
- C. Leucine zipper proteins
- D. Steroid hormones Discuss
- 8. Tubulin is regulated by
Options- A. binding of tubulin to tubulin mRNA
- B. splicing of the tubulin transcript
- C. binding of tubulin to the tubulin translational product
- D. binding of tubulin to DNA Discuss
- 9. Enhancers differ from promoters in that
Options- A. they initiate transcription
- B. they are adjacent to the start codon
- C. their orientation can be inverted without effect
- D. they are restricted to a specific gene Discuss
- 10. Sex hormones activate transcription of specific genes by
Options- A. binding to a transcription factor
- B. binding to RNA polymerase
- C. binding to DNA enhancer region
- D. binding to DNA promoter region Discuss
Genetic Regulation Prokaryotes problems
Search Results
Correct Answer: CG sequences
Correct Answer: Binding of CAP-cAMP complex to the promoter area decreases
Correct Answer: 1
Correct Answer: common transcription factor binding domains
Correct Answer: positive
Correct Answer: attenuator terminates transcription
Correct Answer: Steroid hormones
Correct Answer: binding of tubulin to the tubulin translational product
Correct Answer: their orientation can be inverted without effect
Correct Answer: binding to a transcription factor
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