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6. A frameshift mutation occurs in the sigma subunit gene transcribed as part of SPOl early genes. What will be the immediate result?
A. Early genes will not be translated
B. Middle genes will not be transcribed
C. The bacterial host will lyse immediately
D. Infection will proceed as usual
7. In the presence of high levels of tryptophan
A. attenuator allows transcription of trp structural genes
B. attenuator propogates transcription
C. attenuator terminates transcription
D. none of the above
8. Tubulin is regulated by
A. binding of tubulin to tubulin mRNA
B. splicing of the tubulin transcript
C. binding of tubulin to the tubulin translational product
D. binding of tubulin to DNA
9. Transcription factors are
A. regions of DNA in the promoter area
B. regions of DNA in the enhancer area
C. any protein which binds to DNA
D. proteins which bind DNAand initiate transcription
10. Genes which need to be coordinately regulated but are not in operons may be regulated by
A. common transcription factor binding domains
B. TATA boxes
C. CAAT regions
D. GC regions
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