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? QID: 107005 Type & Select Correct Answer 1 Recombination 27% (12/45) 2 Reassortment 60% (27/45) 3 Complementation 0% (0/45) 4 Phenotypic mixing 4% (2/45) 5 Transformation 7% (3/45) M 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (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? QID: 106972 Type & Select Correct Answer 1 Virions containing genome X and nucleocapsid Y will be produced 26% (20/76) 2 Virions containing genome X and nucleocapsid X will be produced 45% (34/76) 3 Virions containing genome Y and nucleocapsid Y will be produced 13% (10/76) 4 Virions containing genome Y and nucleocapsid X will be produced 5% (4/76) 5 No virions will be produced 5% (4/76) M 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic (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? QID: 106874 Type & Select Correct Answer 1 Recombination 9% (6/68) 2 Reassortment 3% (2/68) 3 Complementation 68% (46/68) 4 Phenotypic mixing 3% (2/68) 5 Transduction 12% (8/68) M 1 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic
All Videos (1) Login to View Community Videos Login to View Community Videos Antigenic Shift, Direct Transfer and Reassortment Thomas Heineman Microbiology - Viral Genetics D 2/9/2015 66 views 5.0 (1)