Transcription problems
- 1. Which of the following enzyme(s) is/are required for lactose fermentation?
Options- A. Transacetylase
- B. ?-galactosidase
- C. Galactoside permease
- D. All of these Discuss
Correct Answer: All of these
- 2. Which eukaryotic RNA polymerase makes tRNA's?
Options- A. RNA polymerase 1
- B. RNA polymerase 2
- C. RNA polymerase 3
- D. Any of these Discuss
Correct Answer: RNA polymerase 3
- 3. Recognition/binding site of RNA polymerase is called
Options- A. receptor
- B. promoter
- C. facilitator
- D. terminator Discuss
Correct Answer: promoter
- 4. Which of the following component of RNA polymerase facilitates the recognition of promoter sequences?
Options- A. a subunit
- B. b subunit
- C. s subunit
- D. c subunit Discuss
Correct Answer: s subunit
- 5. The components found in all prokaryotic transcription terminators is
Options- A. a poly-U region
- B. Rho factor
- C. a hairpin structure
- D. none of these Discuss
Correct Answer: a hairpin structure
- 6. Which of the following proteins first binds to TATA box during transcription?
Options- A. TF II A
- B. TF II D
- C. TF II B
- D. RNA polymerase Discuss
Correct Answer: TF II D
- 7. Which of the following enzyme is used for synthesis of RNA under the direction of DNA?
Options- A. RNA polymerase
- B. DNA ligase
- C. DNA polymerase
- D. RNA ligase Discuss
Correct Answer: RNA polymerase
- 8. An mRNA transcript of a gene contains
Options- A. a start codon
- B. a stop codon
- C. a terminator
- D. all of these Discuss
Correct Answer: all of these
- 9. Which of the following is a product of transcription?
Options- A. mRNA
- B. tRNA
- C. rRNA
- D. all of these Discuss
Correct Answer: all of these
- 10. A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called
Options- A. activation
- B. attenuation
- C. corepression
- D. desiccation Discuss
Correct Answer: attenuation
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