edited sample exam 3

edited sample exam 3 - 1. Which of the following is F ALSE...

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1. Which of the following is FALSE regarding lysogenic phage replication? a. The phage can contribute to the host bacteria’s pathogenicity through the expression of some genes carried into the host by the phage itself. b. During this type of infection, the phage produces enzymes which act to degrade the host cell’s own DNA. c. The host cell may develop immunity from being infected by other lysogenic phages. d. As the host cell reproduces, each daughter cell will be infected with the lysogenic phage. 2. Which of the following roles do late proteins play in the lytic bacteriophage replication cycle? a. attachment to host cells b. production of peplomers c. synthesis of viral nucleic acids d. production of antibodies 3. During conjugation between an Hfr cell and an F- cell, which of the following is the BEST prediction of the genetic exchange that can successfully occur? a. No conjugation event can occur with this pairing. b. At the end of the successful exchange and recombination, the recipient cell will remain unable to produce a pilus, but will have gained genetic information from the donor cell’s genome. c. At the end of this conjugation, both the recipient cell and the donor cell will have a complete F factor incorporated into their chromosomes. d. After a successful recombination, the recipient cell will possess the ability to produce a pilus and have gained a new genetic trait from the donor’s chromosome as well. 4. Viruses MAY NOT be cultivated in/on ________. a. embryonated chicken eggs b. bacterial cultures c. blood agar medium d. tissue culture cell lines
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5. The proteins which make up bacteriophage tail fibers are ______. a. encoded by the bacterial genome itself and synthesized by viral ribosomes b. encoded by the viral genome itself and synthesized by bacterial ribosomes c. encoded by the eukaryotic genome itself and synthesized by eukaryotic ribosomes d. encoded by the viral genome itself and synthesized by eukaryotic ribosomes 6. Which of the following is NOT a characteristic used to determine the taxonomical hierarchy of viruses? a. the presence or absence of an envelope b. the number of different peplomers found on the virus c. the size of the virus d. the specific tissue that is infected by the virus 7. During an infection of a temperate bacteriophage, assays for both Cro protein and lambda repressor protein have been performed. High levels of Cro protein were obtained, but virtually no lambda repressor was measured. Use this data to predict the replication style that this phage will follow under these conditions. a. the phage will follow a lytic replication cycle b. the phage will follow a lysogenic replication cycle c. there’s not enough information to make a determination of which path will be followed d. lysogenic conversion will occur under these circumstances 8. Which of the following methods of viral entry is MISMATCHED ? a.
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edited sample exam 3 - 1. Which of the following is F ALSE...

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