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11. 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
12. 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
13. 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
14. 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
15. 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
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