701. What is a promoter?
A. A specific sequence of DNA to which a catabolic repressor binds
B. A specific sequence of DNA to which RNA polymerase binds
C. A specific DNA sequence to which a restriction endonuclease binds
D. None of the above

702. The function of the sigma factor of RNA polymerase is to
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

703. In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as
A. CATT
B. Shine Dalgarno region
C. TATA box
D. SV40 region

704. The RNA polymerases that transcribe bacterial DNA are
A. multisubunit enzymes
B. only active inside the cell
C. interchangable with DNA polymerases
D. highly glycosylated in their active forms

705. Immediately after transcription
A. a methylated guanine cap is added to the 51 end of the transcript
B. a methylated guanine cap is added to the 31 end of the transcript
C. both (a) and (b)
D. a poly adenylation signal is added

706. Transcription factors are
A. promoters
B. proteins which bind to DNA and regulate transcription
C. TATA boxes
D. CATT boxes

707. The major function of RNA polymerase’s sigma factor is
A. recognition of the translational stop sequence
B. recognition of the transcriptional start sequence
C. recognition of the transcriptional stop sequence
D. recognition of the translational start sequence

708. Most transcripts of protein coding genes are cleaved
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

709. RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________
A. translation, RNA polymerase
B. transcription, DNA polymerase
C. transcription, RNA polymerase
D. replication, DNA polymerase

710. The closed complex at bacterial promoters is
A. in equilibrium with free RNA polymerase and the promoter
B. not affected by promoter mutations
C. bound more tightly when repressors are present
D. not affected by activator proteins 

This Post Has 3 Comments

  1. graliontorile

    Hello there, I found your website via Google while looking for a related topic, your web site came up, it looks great. I have bookmarked it in my google bookmarks.

Leave a Reply