Biochemistry - Transcription and Regulation

Exercise :: Transcription and Regulation - Section 1

  • Transcription and Regulation - Section 1
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

Answer: Option B

Explanation:

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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

Answer: Option A

Explanation:

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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

Answer: Option C

Explanation:

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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

Answer: Option A

Explanation:

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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

Answer: Option A

Explanation:

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