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6. Enhancers are regions that
A. bind RNA polymerase
B. are adjacent to the TATA box
C. are CAT box binding proteins
D. modulate transcription
7. Transcription by E. coli polymerase occurs in
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
8. Which of the following is necessary for transcription to occur?
A. DNA molecule
B. RNA polymerase
C. DNA polymerase
D. Both DNA & RNA polymerase
9. Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes
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
10. Each tRNA molecule has a cloverleaf secondary structure consisting of
A. three stem loops
B. two stem loops
C. four stem loops
D. either (a) or (b)
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