front 1 How do all viruses differ from bacteria? | back 1 Viruses are not composed of cells |
front 2 Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals? | back 2 They cannot reproduce themselves outside a host. |
front 3 Which of the following statements about viral spikes is FALSE? | back 3 They are found only on nonenveloped viruses. |
front 4 Which of the following is NOT used as a criterion to classify viruses? | back 4 biochemical tests |
front 5 Which of the following is NOT utilized to culture viruses? | back 5 culture media |
front 6 Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps | back 6 biosynthesis |
front 7 The definition of lysogeny is | back 7 phage DNA is incorporated into host cell DNA |
front 8 A viroid is a(n) | back 8 infectious piece of RNA without a capsid. |
front 9 In Figure 13.1, which structure is a complex virus | back 9 b |
front 10 The structures illustrated in Figure 13.1 are composed of | back 10 Capsomeres |
front 11 A clear area against a confluent lawn of bacteria is called a | back 11 plaque |
front 12 Continuous cell lines differ from primary cell lines in that | back 12 continuous cell lines can be maintained through an indefinite number of generations. |
front 13 Which of the following is necessary for replication of a prion? | back 13 PrPSc |
front 14 14) A persistent infection is one in which | back 14 the disease process occurs gradually over a long period |
front 15 Which of the following statements is FALSE? | back 15 The prophage makes the host cell immune to infection by other phages. |
front 16 Lysogeny can result in all of the following EXCEPT | back 16 immunity to reinfection by any phage |
front 17 Which of the following would be the first step in biosynthesis of a virus with a (minus) strand of RNA? | back 17 synthesis of double-stranded RNA from an RNA template |
front 18 An infectious protein is a | back 18 prion |
front 19 An envelope is acquired during which of the following steps? | back 19 release |
front 20 Which of the following statements is NOT true of lysogeny? | back 20 It causes lysis of host cells. |
front 21 An example of a latent viral infection is | back 21 cold sores |
front 22 A viruss ability to infect an animal cell depends primarily upon the | back 22 presence of receptor sites on the cell membrane |
front 23 Assume you have isolated an unknown virus. This virus has a single, positive sense strand of RNA, and possesses an envelope. To which group does it most likely belong | back 23 togavirus |
front 24 The mechanism whereby an enveloped virus leaves a host cell is called | back 24 budding |
front 25 The most conclusive evidence that viruses cause cancers is provided by | back 25 cancer following injection of cell-free filtrates |
front 26 Bacteriophages derive all of the following from the host cell EXCEPT | back 26 lysozyme |
front 27 Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves | back 27 injection of naked nucleic acid into the host cell |
front 28 Generally, in an infection caused by a DNA-containing virus, the host animal cell supplies all of the following EXCEPT | back 28 DNA polymerase. |
front 29 Which of the following places these items in the correct order for DNA-virus replication? 1. Maturation 2. DNA synthesis 3. Transcription 4. Translation | back 29 2; 3; 4; 1 |
front 30 A viral species is a group of viruses that | back 30 has the same genetic information and ecological niche. |
front 31 Viruses that utilize reverse transcriptase belong to the virus families | back 31 Hepadnaviridae and Retroviridae |
front 32 DNA made from an RNA template will be incorporated into the virus capsid of | back 32 Hepadnaviridae |
front 33 Which of the following statements about viruses is FALSE? | back 33 Viruses use their own catabolic enzymes. |
front 34 A lytic virus has infected a patient. Which of the following would best describe what is happening inside the patient? | back 34 The virus is causing the death of the infected cells in the patient. |
front 35 Some viruses, such as human herpesvirus 1, infect a cell without causing symptoms. These are called | back 35 latent viruses |
front 36 Assume a patient had chickenpox (human herpesvirus 3) as a child. Which line on the graph in Figure 13.2 would show the number of viruses present in this person as a 60-year-old with shingles (human herpesvirus 3)? | back 36 e |
front 37 Assume a patient has influenza. During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness | back 37 c |
front 38 The following steps occur during multiplication of herpesviruses. Which is the third step? | back 38 uncoating |
front 39 The following steps occur during multiplication of retroviruses. Which is the fourth step? | back 39 synthesis of double-stranded DNA |
front 40 Oncogenic viruses | back 40 cause tumors to develop |
front 41 Which one of the following steps does NOT occur during multiplication of a picornavirus? | back 41 synthesis of DNA |
front 42 Which of the following is most likely a product of an early gene? | back 42 DNA polymerase |
front 43 Most RNA viruses carry which of the following enzymes | back 43 Most RNA viruses carry which of the following enzymes |
front 44 The following steps occur during biosynthesis of a + strand RNA virus. What is the third step | back 44 synthesis of strand RNA |
front 45 What contributes to antigenic shift in influenza viruses? | back 45 a segmented genome |