BMB251EXAM2 - There are 33 questions, 3 points each except...

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There are 33 questions, 3 points each except question 1 is 4 points. Don't submit till you finish the last question or you are out of time. 1. Following statements, which one is INCORRECT about protein production? A. The rate of transcription regulates protein production. B. The rate of translation is the only mechanism in regulating protein production. C. The stability of mRNA regulates protein production. D. mRNA polyadenylation regulates protein production. Points Earned: 4/4 Correct Answer: B Your Response: B 2. According to the picture below, assign the right name to each part of the RNA polymerase engaging transcriptional elongation.
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A. (1) newly synthesized RNA strand; (2) RNA exit channel; (3) short stretch of RNA/DNA helix; (4) active site. B. (1) active site; (2) short stretch of RNA/DNA helix; (3) RNA exit channel; (4) newly synthesized RNA strand. C. (1) newly synthesized RNA strand; (2) short stretch of RNA/DNA helix; (3) RNA exit channel; (4) active site. D. (1) newly synthesized RNA strand; (2) active site; (3) short stretch of RNA/DNA helix; (4) RNA exit channel.
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Points Earned: 3/3 Correct Answer: A Your Response: A 3. What is the correct description of the function of sigma factor in prokaryotic transcription? A. Promoter recognition. B. Unzipping DNA. C. Elongation. D. Termination. Points Earned: 3/3 Correct Answer: A Your Response: A
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4. What is the correct order of the cycling events during transcription? A. Formation of closed RNA polymerase/DNA complex formation of open RNA polymerase/DNA complex initiation of RNA synthesis elongation termination. B. Formation of open RNA polymerase/DNA complex formation of closed RNA polymerase/DNA complex initiation of RNA synthesis elongation termination. C. Formation of open RNA polymerase/DNA complex formation of closed RNA polymerase/DNA complex elongation initiation of RNA synthesis termination. D. Formation of closed RNA polymerase/DNA complex formation of open RNA polymerase/DNA complex elongation initiation of RNA synthesis termination. Points Earned: 3/3 Correct Answer: A
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Your Response: A 5. Which statement is a RIGHT functional description of eukaryotic general transcription factors? A. TFII B recognizes the TATA box. B. TF II E recognizes the TATA box. C. TFIID helps unzip DNA using helicase activity. D. TFII H has a kinase activity to phosphorylate RNA polymerase II. Points Earned: 3/3 Correct Answer: D Your Response: D 6. Which of the following statements is CORRECT about eukaryotic and prokaryotic RNA processing?
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A. Both prokaryotic and eukaryotic RNA are capped at the 5’ end. B. Polyadenylation occurs in prokaryotic cells but not in eukaryotic cells. C.
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This note was uploaded on 12/06/2009 for the course BMB 251 at Pennsylvania State University, University Park.

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BMB251EXAM2 - There are 33 questions, 3 points each except...

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