Discussion
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- Question
The lac operon is transcribed in which segments?
Options- A. 1
- B. 2
- C. 3
- D. 4
- Correct Answer
- 1
- 1. 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
- 2. 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
- 3. Alternate splicing of RNA transcripts is a mechanism to regulate
Options- A. tubulin
- B. tachykinins
- C. DNA methylation
- D. leucine zippers Discuss
- 4. Sex determination in Drosophila involves
Options- A. alternate splicing
- B. methylation
- C. gene amplification
- D. none of these Discuss
- 5. Transcription factors are
Options- A. regions of DNA in the promoter area
- B. regions of DNA in the enhancer area
- C. any protein which binds to DNA
- D. proteins which bind DNAand initiate transcription Discuss
- 6. 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
- 7. DNA is methylated at
Options- A. AC sequences
- B. TATA sequences
- C. CAAT sequences
- D. CG sequences Discuss
- 8. 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 Discuss
- 9. 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
- 10. 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
Genetic Regulation Prokaryotes problems
Search Results
Correct Answer: common transcription factor binding domains
Correct Answer: positive
Correct Answer: tachykinins
Correct Answer: alternate splicing
Correct Answer: proteins which bind DNAand initiate transcription
Correct Answer: Binding of CAP-cAMP complex to the promoter area decreases
Correct Answer: CG sequences
Correct Answer: The bacterial host will lyse immediately
Correct Answer: attenuator terminates transcription
Correct Answer: Steroid hormones
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