Discussion
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- Question
In the presence of tryptophan in the cell, the repressor is __________
Options- A. bound to tryptophan
- B. bound to DNA
- C. bound to both DNA and tryptophan
- D. bound to neither tryptophan nor DNA
- Correct Answer
- bound to both DNA and tryptophan
- 1. The lac operon is translated into __________ proteins.
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. What technique can be used to determine the murderer who left blood with the victim?
Options- A. DNA sequencing
- B. PCR amplification
- C. Western blot
- D. RFLP mapping Discuss
- 7. PCR can be used to amplify a specific fragment of DNA from which of the following?
Options- A. A drop of blood
- B. A hair follicle
- C. A fragment of skin
- D. All of these Discuss
- 8. In a PCR reaction after four cycles, each molecule of a duplex DNA will give rise to
Options- A. 16 single strands of DNA
- B. 16 double stranded DNA
- C. 18 single strands of DNA
- D. 18 double stranded DNA Discuss
- 9. To clone into a plasmid vector, both the plasmid and the foreign DNA are cut
Options- A. with the same restriction enzyme and mixed together
- B. with different restriction enzyme and mixed together
- C. with the combination of enzymes and then seperated
- D. with the combination of enzymes and mixed together Discuss
- 10. From a single molecule of DNA, PCR can make
Options- A. one additional copy
- B. hundreds of copies
- C. thousands of copies
- D. millions of copies Discuss
Genetic Regulation Prokaryotes problems
Search Results
Correct Answer: 3
Correct Answer: binding to a transcription factor
Correct Answer: their orientation can be inverted without effect
Correct Answer: binding of tubulin to the tubulin translational product
Correct Answer: Steroid hormones
Correct Answer: PCR amplification
Correct Answer: All of these
Correct Answer: 16 single strands of DNA
Correct Answer: with the same restriction enzyme and mixed together
Correct Answer: millions of copies
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