Exam 2, sample

Exam 2, sample - Biol 1362 Spring 06 Exam 2 CH 13 Questions...

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Page 1 Biol 1362 Spring 06 Exam 2 CH 13 Questions Use the following to answer questions 1-2: A bacterial virus infection: A BC 1. What are the possible outcomes of the host cell shown after step C is completed? A) the host cell continues to grow and divide. B) the virus replicates its' DNA independently of the host DNA. C) the host cell is eventually killed. D) All are correct. E) A and C are correct. 2. The transition from step "B" to step "C": A) results in prophage formation. B) results in no harm to the host cell. C) could possibly lead to transduction. D) A and B are both true. E) A, B, and C are true. Use the following to answer questions 3-4: Lactose operon: 3. The regulatory gene in this graphic is labeled A) A B) B C) C D) D E) F
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Page 2 4. What is occuring with this cell as shown by the events depicted in this graphic? A) Lactose can now be metabolized as an energy source by the cell. B) The structural genes are transcribed into mRNA's. C) The cell is obviously not in a lactose-rich environment. D) Repressor is binding to the promoter. E) None of these are true. Use the following to answer questions 5-6: 5. Which labeled part of the virus is responsible for host cell recognition and binding? A) A B) B C) C D) D E) None of the above. 6. The portion of the virus labeled "C" is called the A) provirus B) capsid C) reverse transcriptase D) nucleic acid E) envelope 7. The infection of a cell by an animal virus could have which of the following consequences? A) kill the host cell B) provirus formation in the host cell C) provirus formation coupled with formation of new viral particles D) lysis of the host cell followed by provirus formation in the lysed cell E) A, B, and C are all possible consequences. Match the following with the questions below: A) infectious protein B) "naked RNA" that can cause infection primarily in plants C) RNA virus capable of integrating into host DNA 8. retrovirus 9. prion 10. viroid
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Page 3 11. A bacterial culture growing on tryptophan: A) would have an active trp operon repressor protein. B) would have transcription of the trp operon structural genes. C) would have an inactive trp operon repressor protein. D) A and B are correct. E) B and C are correct. 12. A bacterial cell having a restriction enzyme would stop the infection of a phage at what point? A) attachment B) synthesis C) penetration D) assembly E) release CH 14 Questions 13. The formation of the eukaryotic transcription initiation complex requires : A) a transcription activator B) a repressor C) an operator sequence D) a 5' cap and a 3' poly A tail E) A and C 14. Which of the following events would result in a protein being made by a eukaryotic cell?
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Exam 2, sample - Biol 1362 Spring 06 Exam 2 CH 13 Questions...

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