micro_exam_4_spring_09 - 49 The replication of animal...

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49. The replication of animal viruses differs from the replication of bacteriophages in what way? a. Once inside the host cell, animal viruses undergo a process of “uncoating” whereby the viral genome is separated from its protein coat; the genome of a bacteriophage is already without a coat once it is in the host cell b. In the penetration stage, bacteriophages inject their DNA through the phage tail core into the bacterial cell; animal viruses either fuse their envelope with the host’s plasma membrane or enter by endocytosis c. Both of the above (a and b) are correct d. Neither of the above (a nor b) is correct e. Only a is correct 50. ( True or false) Viruses that cause acute infections usually result in productive infections.
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42. A virus with an RNA-dependent RNA polymerase 43. The most important factor that influences the host range of a bacteriophage is 44. (True or false ) The mechanism of viral release known as budding occurs only with naked viruses. 45. A bacteriophage infection that is termed productive is most likely an infection with a The following are the steps of phage replication by dsDNA bacteriophages 1) release; 2) penetration; 3) attachment; 4) transcription and translation of viral DNA; 5) assembly; 6) replication of phage DNA and protein 46.
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