Overview Recombination exchange of genes between 2 chromosomes crossing over occurs in homologous regions Reassortment viruses with segmented genomes exchange segments analagous to high-frequency recombination results in influenza pandemics Complementation 2 viruses infect a cell, but one is mutated and has a non-functional protein the nonmutated virus helps the mutant by making protein for both viruses Phenotypic mixing 2 viruses infect a cell virus A has its own genetic material, but the surface proteins of virus B progeny viruses contain coat components and genetic material from virus A this is because they only had the genetic material from virus A genetic material is not altered pseudovirion formation when a virus's coat is entirely from another virus nucleic acid and coat are completely mismatched
QUESTIONS 1 of 5 1 2 3 4 5 Previous Next Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (M1.MC.15.0) A scientist performed an experiment to produce hybrid viruses by mixing two different serotypes of influenza virus, H1N1 and H2N2, in a respiratory epithelium cell line. Several days later, the scientist collected the media and analyzed the viral progeny. She found the following serotypes of virus: H1N1, H2N2, H1N2, and H2N1. Which of the following terms best explains the appearance of new serotypes? Tested Concept QID: 107005 Type & Select Correct Answer 1 Recombination 27% (8/30) 2 Reassortment 57% (17/30) 3 Complementation 0% (0/30) 4 Phenotypic mixing 3% (1/30) 5 Transformation 10% (3/30) L 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review tested concept (M1.MC.15.10000) Two viruses, X and Y, infect the same cell and begin to reproduce within the cell. As a result of the co-infection, some viruses are produced where the genome of Y is surrounded by the nucleocapsid of X and vice versa with the genome of X and nucleocapsid of Y. When the virus containing genome X surrounded by the nucleocapsid of Y infects another cell, what is the most likely outcome? Tested Concept QID: 106972 Type & Select Correct Answer 1 Virions containing genome X and nucleocapsid Y will be produced 20% (10/50) 2 Virions containing genome X and nucleocapsid X will be produced 42% (21/50) 3 Virions containing genome Y and nucleocapsid Y will be produced 20% (10/50) 4 Virions containing genome Y and nucleocapsid X will be produced 8% (4/50) 5 No virions will be produced 4% (2/50) L 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review tested concept (M1.MC.14.102) When hepatitis D was injected into an immunocompromised mouse, there was no detectable hepatitis D RNA in the blood at any time point during the next several months. When co-injected with hepatitis B, hepatitis D RNA was was detected in the blood. Which of the following best describes this phenomenon? Tested Concept QID: 106874 Type & Select Correct Answer 1 Recombination 11% (6/56) 2 Reassortment 4% (2/56) 3 Complementation 64% (36/56) 4 Phenotypic mixing 2% (1/56) 5 Transduction 12% (7/56) L 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review tested concept
All Videos (1) Podcasts (0) Login to View Community Videos Login to View Community Videos Antigenic Shift, Direct Transfer and Reassortment Thomas Heineman Microbiology - Viral Genetics 2/9/2015 56 views (1)