Discussion
Home ‣ Biochemistry ‣ Transcription and Regulation Comments
- Question
The nucleons of eukaryotic cell has
Options- A. RNA polymerase I
- B. RNA polymerase II
- C. RNA polymerase III
- D. all of these
- Correct Answer
- all of these
- 1. In prokaryotes, transcription is
Options- A. terminated by the stop codon
- B. terminated by a protein called rho
- C. terminated by a poly A sequence
- D. terminated by a start codon Discuss
- 2. The function of the sigma factor of RNA polymerase is to
Options- A. assure that transcription begins at the proper point
- B. assure that transcription ends at the proper point
- C. assure that translation begins at the proper point
- D. assure that translation ends at the proper point Discuss
- 3. In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is
Options- A. RNA polymerase I
- B. RNA polymerase II
- C. RNA polymerase III
- D. none of these Discuss
- 4. The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed
Options- A. start codons.
- B. oriC regions.
- C. Shine Dalgarno sequences.
- D. promoters. Discuss
- 5. Promoters for tRNAs are located
Options- A. upstream from the start codon
- B. downstream from the start codon
- C. both (a) and (b)
- D. none of these Discuss
- 6. Most transcripts of protein coding genes are cleaved
Options- A. at the 3' end just after a poly adenylation signal
- B. at the 3' end just before a poly adenylation signal
- C. at the 5' end immediately after a poly adenylation signal
- D. at the 5' end immediately before a poly adenylation signal Discuss
- 7. Each tRNA molecule has a cloverleaf secondary structure consisting of
Options- A. three stem loops
- B. two stem loops
- C. four stem loops
- D. either (a) or (b) Discuss
- 8. The RNA polymerases that transcribe bacterial DNA are
Options- A. multisubunit enzymes
- B. only active inside the cell
- C. interchangable with DNA polymerases
- D. highly glycosylated in their active forms Discuss
- 9. Transcription by E. coli polymerase occurs in
Options- A. four phases known as initiation, propagation, elongation and termination
- B. three phases known as initiation, elongation and termination
- C. two phases known as initiation and termination
- D. none of the above Discuss
- 10. Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes
Options- A. are transcribed by rRNA polymerase III and the 5S rRNA
- B. are transcribed by rRNA polymerase II
- C. are transcribed by rRNA polymerase I and the 5S rRNA
- D. are transcribed by DNA polymerase I Discuss
Transcription and Regulation problems
Search Results
Correct Answer: terminated by a protein called rho
Correct Answer: assure that transcription begins at the proper point
Correct Answer: RNA polymerase II
Correct Answer: promoters.
Correct Answer: downstream from the start codon
Correct Answer: at the 3' end just after a poly adenylation signal
Correct Answer: three stem loops
Correct Answer: multisubunit enzymes
Correct Answer: three phases known as initiation, elongation and termination
Correct Answer: are transcribed by rRNA polymerase III and the 5S rRNA
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