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Questions and Answers
What is the main function of a virus particle?
What is the main function of a virus particle?
- To deliver its DNA or RNA into the host cell (correct)
- To replicate its own genome
- To generate energy for the host cell
- To form a protective coat around the host cell
What is the role of the nucleoprotein in a virus?
What is the role of the nucleoprotein in a virus?
- To protect the host cell from viral infection
- To form the protective coat of the virus
- To deliver energy to the virus
- To assist in the replication of the virus (correct)
What is the significance of viruses being unable to generate energy?
What is the significance of viruses being unable to generate energy?
- It allows them to become inert outside the host cell
- It enables them to crystallize easily
- It prevents them from replicating
- It makes them dependent on host cell machinery for replication (correct)
What is the term used for a complete virus particle?
What is the term used for a complete virus particle?
How are viruses classified based on their genome?
How are viruses classified based on their genome?
What does it mean for viruses to be viewed as mobile genetic elements?
What does it mean for viruses to be viewed as mobile genetic elements?
Which basic patterns does self-assembly of virus capsids follow?
Which basic patterns does self-assembly of virus capsids follow?
What type of viruses exhibit a fringe of glycoprotein spikes or knobs, also called peplomers?
What type of viruses exhibit a fringe of glycoprotein spikes or knobs, also called peplomers?
Which morphology is characteristic of the nucleocapsids of many 'spherical' viruses?
Which morphology is characteristic of the nucleocapsids of many 'spherical' viruses?
What does the genome of a virus consist of?
What does the genome of a virus consist of?
What is the genomic RNA strand called in orientation if it can serve as mRNA?
What is the genomic RNA strand called in orientation if it can serve as mRNA?
What are the parameters for classification of viruses?
What are the parameters for classification of viruses?
Based on pathogenicity, how are viruses affecting the same tissue grouped together?
Based on pathogenicity, how are viruses affecting the same tissue grouped together?
"Arboviruses" are viruses transmitted by:
"Arboviruses" are viruses transmitted by:
"Roboviruses" are defined in the text as viruses with:
"Roboviruses" are defined in the text as viruses with:
"Nucleocapsids" consist of a helical array of capsid proteins wrapped around a helical filament of:
"Nucleocapsids" consist of a helical array of capsid proteins wrapped around a helical filament of:
"Monopartite genome" refers to a genome that occupies:
"Monopartite genome" refers to a genome that occupies:
"Families" and "genera" are terms used for classifying viruses based on:
"Families" and "genera" are terms used for classifying viruses based on:
Which virus family does not have an envelope?
Which virus family does not have an envelope?
Which virus family has a complex capsid symmetry?
Which virus family has a complex capsid symmetry?
Which virus family has a single-stranded DNA genome?
Which virus family has a single-stranded DNA genome?
Which RNA virus family has an icosahedral capsid symmetry?
Which RNA virus family has an icosahedral capsid symmetry?
Which DNA virus family has an enveloped capsid?
Which DNA virus family has an enveloped capsid?
Which DNA virus family has a complex capsid symmetry?
Which DNA virus family has a complex capsid symmetry?
Which RNA virus family has a single-stranded positive-sense genome?
Which RNA virus family has a single-stranded positive-sense genome?
Which viruses are designated by a number for subspecies?
Which viruses are designated by a number for subspecies?
What is the nucleic acid type of Picornaviruses?
What is the nucleic acid type of Picornaviruses?
What is the capsid symmetry of Caliciviruses?
What is the capsid symmetry of Caliciviruses?
Which statement accurately describes the role of the viral genome in a complete virus particle?
Which statement accurately describes the role of the viral genome in a complete virus particle?
What distinguishes viruses from other microorganisms in terms of energy generation?
What distinguishes viruses from other microorganisms in terms of energy generation?
What is the primary function of the nucleocapsid in a virus?
What is the primary function of the nucleocapsid in a virus?
Why are viruses considered as mobile genetic elements?
Why are viruses considered as mobile genetic elements?
What characteristic distinguishes virions from host cell organelles?
What characteristic distinguishes virions from host cell organelles?
Which virus family is characterized by a simplex dsDNA and an icosahedral capsid symmetry?
Which virus family is characterized by a simplex dsDNA and an icosahedral capsid symmetry?
What is the family name for a virus with a single-stranded negative-sense RNA and a helical capsid symmetry?
What is the family name for a virus with a single-stranded negative-sense RNA and a helical capsid symmetry?
Which virus family has a genome consisting of single-stranded positive-sense RNA and is enveloped with an icosahedral capsid symmetry?
Which virus family has a genome consisting of single-stranded positive-sense RNA and is enveloped with an icosahedral capsid symmetry?
Which virus family is characterized by a single-stranded positive-sense RNA and a capsid symmetry of unknown type?
Which virus family is characterized by a single-stranded positive-sense RNA and a capsid symmetry of unknown type?
What is the family name for a virus with a double-stranded DNA genome and an icosahedral capsid symmetry?
What is the family name for a virus with a double-stranded DNA genome and an icosahedral capsid symmetry?
What is the term used for the nucleocapsids of many filamentous and pleomorphic viruses?
What is the term used for the nucleocapsids of many filamentous and pleomorphic viruses?
Which criteria are NOT used for the classification and nomenclature of viruses as mentioned in the text?
Which criteria are NOT used for the classification and nomenclature of viruses as mentioned in the text?
Which type of genome necessitates different replication strategies for a virus?
Which type of genome necessitates different replication strategies for a virus?
What is the term for the genomic RNA strand of single-stranded RNA viruses in orientation if it can serve as mRNA?
What is the term for the genomic RNA strand of single-stranded RNA viruses in orientation if it can serve as mRNA?
Which feature is NOT used for the classification of viruses?
Which feature is NOT used for the classification of viruses?
Flashcards
Virus function
Virus function
To infect a host cell and replicate itself
Nucleoprotein role
Nucleoprotein role
Protects genetic material and aids replication
Virus classification
Virus classification
Based on genome type (RNA, DNA)
Virus classification parameters
Virus classification parameters
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Icosahedral symmetry
Icosahedral symmetry
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Helical symmetry
Helical symmetry
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Nucleocapsid morphology
Nucleocapsid morphology
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Viral genome
Viral genome
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Positive-sense RNA
Positive-sense RNA
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Viral energy dependency
Viral energy dependency
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Virion
Virion
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Arbovirus
Arbovirus
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Monopartite genome
Monopartite genome
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Virus families/genera
Virus families/genera
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Herpesvirus envelope
Herpesvirus envelope
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Adenovirus symmetry
Adenovirus symmetry
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Parvovirus genome
Parvovirus genome
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Picornavirus symmetry
Picornavirus symmetry
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Picornavirus genome
Picornavirus genome
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Herpesvirus genome
Herpesvirus genome
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Mobile genetic elements
Mobile genetic elements
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Nucleocapsid function
Nucleocapsid function
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Virus vs. other microorganisms
Virus vs. other microorganisms
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Study Notes
Virus Structure and Function
- The main function of a virus particle is to infect a host cell and replicate itself.
- The nucleoprotein plays a crucial role in a virus, as it protects the genetic material and helps in the replication process.
Virus Classification
- Viruses are classified based on their genome, which can be single-stranded RNA, double-stranded DNA, or single-stranded DNA.
- The parameters for classification of viruses include morphology, replication strategy, and genome type.
Virus Morphology
- Icosahedral capsid symmetry is characteristic of many RNA viruses.
- Helical symmetry is characteristic of many filamentous and pleomorphic viruses.
- The nucleocapsids of many 'spherical' viruses have a characteristic "spherical" morphology.
Genome and Replication
- The genome of a virus consists of genetic material, which can be DNA or RNA.
- The genomic RNA strand of single-stranded RNA viruses is called "positive-sense" if it can serve as mRNA.
- Viruses are unable to generate energy and rely on the host cell's energy sources.
Terms and Definitions
- A complete virus particle is called a "virion".
- "Arboviruses" are viruses transmitted by arthropods.
- "Roboviruses" are viruses with a robot-like capsid structure.
- "Nucleocapsids" consist of a helical array of capsid proteins wrapped around a helical filament of genetic material.
- "Monopartite genome" refers to a genome that occupies a single segment of genetic material.
- "Families" and "genera" are terms used for classifying viruses based on their evolutionary relationships.
Virus Families
- The herpesvirus family does not have an envelope.
- The adenovirus family has a complex capsid symmetry.
- The parvovirus family has a single-stranded DNA genome.
- The picornavirus family has an icosahedral capsid symmetry and a single-stranded positive-sense RNA genome.
- The herpesvirus family has an enveloped capsid and a double-stranded DNA genome.
Other
- Viruses are considered "mobile genetic elements" because they can move genetic material between hosts.
- The primary function of the nucleocapsid is to protect the genetic material and facilitate replication.
- Viruses are distinguished from other microorganisms by their inability to generate energy.
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