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Micro, Chap 5 Virus

Chapter 5 viruses

TermDefinition
capsid. Helical and icosahedral are terms used to describe the shapes of a virus
capsomeres. Virus capsids are made from subunits called
cannot be seen with a light microscope Which of the following is correct about viruses?
envelope Which of the following is not associated with every virus?
tail fibers These structures are used by bacteriophages to attach to host cell receptors.
infect Escherichia coli cells. T-even phages
adsorption, penetration, replication, maturation, assembly, release. The correct sequence of events in viral multiplication is
injection of the viral nucleic acid into the host cell. The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is
release. Viruses acquire envelopes around their nucleocapsids during
blood agar Which of the following will not support viral cultivation?
nucleus, cytoplasm In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.
type of host cell receptors on cell membrane. Host range is limited by
cytopathic effects. The virus-induced, specific damage to the host cell that can be seen in a light microscope is called
plaques. Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called
pocks Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called
latent Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called
measles virus. Oncogenic viruses include all the following except
prions Infectious protein particles are called
viroids. Infectious naked strands of RNA are called
a spongiform encephalopathy of humans. Creutzfeld-Jacob disease is
dependent on other viruses for replication. Satellite viruses are
carbohydrate. The capsomers are made of
naked viruses. Viruses that consist of only a nucleocapsid are considered
the nucleic acid along with the capsid. The nucleocapsid consists of
envelope Which of the following parts of a virus is not always present?
tobacco mosaic virus Which of the following viruses did D. Ivanovski and M. Beijerinck work with?
nervous Which body system is mainly affected by Creutzfeldt-Jakob disease?
the virus is integrated into the DNA of the host cell and is latent. When a virus enters a lysogenic phase, it means
Budding or exocytosis How do enveloped animal viruses exit their host?
Lysogenic conversion Clostridium botulinum is made virulent by incorporated prophage genes encoding for the botulinum toxin. What term describes this process?
capsid A _____ is the protein shell around the nucleic acid core of a virus.
bacteriophages Viruses that infect bacteria are specifically called _____.
antibodies Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produced against the virus.
prions, viroids Two noncellular agents, smaller than viruses, are the infectious proteins called _____, and the infectious RNA strands called _____.
primary Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a _____ cell culture.
icosahedral One of the principal capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as an _____ capsid.
envelope A naked virus does not have an _____.
bacterial chromosome During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _____ _____.
cell A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.
Absorption first step of successful bacterial infection
absorption, penetration, replication, assembly, maturation and release the events that occur in the multiplication cycle of bacteriophages
Order, family, subfamily, genus, species The correct hierarchical order for virus classification is:
Created by: Modestkb
 

 



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