Exam 36: RNA Synthesis and Regulation in Prokaryotes

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Choose the correct answer from the list below. Not all of the answers will be used. -The xpression of galactosidase requires the induction of an operon by removal of a(n) ______________.

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I

The Pribnow box:

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C

How do promoters differ in efficiency?

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Frequent transcription of genes with strong promoters occurs every 2 seconds, whereas genes with weak promoters occur approximately every 10 minutes. The strength or efficiency of the promoter acts to regulate gene transcription.

The RNA polymerase can unwind approximately _________________ bases, or about 1.6 turns of B-DNA.

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Coli, what other protein(s) is(are) synthesized when β-galactosidase is synthesized?

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In transcription, the 3`-hydroxyl group:

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Choose the correct answer from the list below. Not all of the answers will be used. -The region of RNA synthesis containing the DNA, RNA, and enzymes is called the ______________.

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How does RNA polymerase find the proper binding site?

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Name the three stages of RNA synthesis.

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RNA polymerases read the template strand in the _________________ direction.

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The first step of transcription depends on the _________________ subunit.

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Describe how RNA is modified.

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What is the theory about how palindromic RNA polymerase transcription termination signals function?

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What is the theory about how palindromic RNA polymerase transcription termination signals function?

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Choose the correct answer from the list below. Not all of the answers will be used. -RNA synthesis (tRNA, mRNA, and rRNA) is called ______________.

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A σ subunit that is mutated such that the protein binds tightly to DNA with a 10-times-higher affinity than wild-type sequences will likely have what effect?

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What is the likely outcome of this change?

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Choose the correct answer from the list below. Not all of the answers will be used. -DNA sequences that direct RNA polymerase to the initiation site are called ______________.

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coli is approximately ______________ nucleotides per second.

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Choose the correct answer from the list below. Not all of the answers will be used. -Unlike DNA synthesis, RNA synthesis does not require a(n) ______________.

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