Viral Genome Replication Quiz

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Which of the following is NOT a function of viral capsids?

Genetic recombination (correct)

Viral genome packaging

Stimulation of the host immune system

Protection from UV radiation

Which families of viruses have a pericapsid?

Both naked and enveloped viruses

All families of viruses have a pericapsid

Naked viruses (correct)

Enveloped viruses

What is the function of RNA-dependent RNA polymerase in negative-sense RNA viruses?

It acts as a template for the synthesis of messenger RNA (correct)

It is not present in negative-sense RNA viruses

It mediates the binding and penetration of the virus inside the host cell

It protects the viral genome from physical and enzymatic damages

Which viral enzyme is responsible for synthesizing new molecules of viral genome from the template of (+) RNAs?

RNA-dependent RNA-polymerase Signup and view all the answers

What is the function of (+) RNAs produced from the integrated DNA in the host genome?

Serve as both mRNAs for translation and templates for the synthesis of new molecules of viral genome Signup and view all the answers

What is the structure of riboviruses with diploid genome?

Two linear single-stranded RNA molecules with a positive polarity linked at the extremity 5’ together forming a dimer Signup and view all the answers

Which viruses require a DNA-dependent DNA polymerase to replicate their genome?

Herpes viruses Signup and view all the answers

Which RNA viruses have a complete linear RNA genome that acts as mRNA and is translated into a viral polyprotein?

Picornaviridae Signup and view all the answers

What is the role of RNA-dependent RNA polymerase in riboviruses with negative RNA genome?

Synthesizes viral genome Signup and view all the answers

Which viruses induce the progression of the cell cycle from the G1 to the S phase to use the cellular DNA polymerase?

Papovavirus Signup and view all the answers

What is the difference between a productive and an abortive infection?

Productive infection leads to viral particle production, while abortive infection does not produce viral particles Signup and view all the answers

What is viral tropism?

The ability of the virus to recognize specific receptors and infect specific cell types Signup and view all the answers

How is gene expression carried out in DNA viruses of the 1st group?

Gene expression occurs in the nucleus through the cellular enzyme RNA polymerase II Signup and view all the answers

What is the replicative strategy of Parvoviruses for the synthesis of mRNAs?

Synthesis of the complementary DNA strand followed by gene expression by the cellular RNA polymerase II Signup and view all the answers

Which enzyme is responsible for synthesizing new molecules of viral genome from the template of (+) RNAs in retroviruses?

Reverse transcriptase Signup and view all the answers

What is the function of the genomic RNA in retroviruses?

To be used for the synthesis of new (+) RNAs Signup and view all the answers

Which enzyme is responsible for integrating the viral DNA into the host genome in retroviruses?

Integrase Signup and view all the answers

Which family of DNA viruses encodes for its own DNA polymerase?

Herpes viruses Signup and view all the answers

Which type of RNA viruses has a complete linear RNA genome that acts as mRNA?

Positive-sense RNA viruses Signup and view all the answers

Which virus requires the host cell's DNA polymerase for replication?

Papovavirus Signup and view all the answers

Which type of ribovirus has a segmented double-stranded RNA genome?

Reoviruses Signup and view all the answers

What is the main function of viral capsids?

To protect nucleic acids from physical and enzymatic damages Signup and view all the answers

What is the role of pericapsid in certain families of viruses?

All of the above Signup and view all the answers

What is the function of RNA-dependent RNA polymerase in negative-sense RNA viruses?

To synthesize new molecules of viral genome from the template of (-) RNAs Signup and view all the answers

Which of the following is a requirement for a cell to be infected by a virus?

The cell must be permissive Signup and view all the answers

What is the difference between a productive and an abortive infection?

A productive infection leads to the production of viral particles, while an abortive infection results in no production of viral particles Signup and view all the answers

What is the period between the penetration of virus into cells and the maturation of viral progeny called?

Period of eclipse Signup and view all the answers

Which of the following viruses has an ion channel protein in its envelope that causes acidification of endocytic vesicles containing the virus?

Influenza virus Signup and view all the answers

Viral Genome Replication Quiz

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Questions and Answers

Which of the following is NOT a function of viral capsids?

Which families of viruses have a pericapsid?

What is the function of RNA-dependent RNA polymerase in negative-sense RNA viruses?

Which viral enzyme is responsible for synthesizing new molecules of viral genome from the template of (+) RNAs?

What is the function of (+) RNAs produced from the integrated DNA in the host genome?

What is the structure of riboviruses with diploid genome?

Which viruses require a DNA-dependent DNA polymerase to replicate their genome?

Which RNA viruses have a complete linear RNA genome that acts as mRNA and is translated into a viral polyprotein?

What is the role of RNA-dependent RNA polymerase in riboviruses with negative RNA genome?

Which viruses induce the progression of the cell cycle from the G1 to the S phase to use the cellular DNA polymerase?

What is the difference between a productive and an abortive infection?

What is viral tropism?

How is gene expression carried out in DNA viruses of the 1st group?

What is the replicative strategy of Parvoviruses for the synthesis of mRNAs?

Which enzyme is responsible for synthesizing new molecules of viral genome from the template of (+) RNAs in retroviruses?

What is the function of the genomic RNA in retroviruses?

Which enzyme is responsible for integrating the viral DNA into the host genome in retroviruses?

Which family of DNA viruses encodes for its own DNA polymerase?

Which type of RNA viruses has a complete linear RNA genome that acts as mRNA?

Which virus requires the host cell's DNA polymerase for replication?

Which type of ribovirus has a segmented double-stranded RNA genome?

What is the main function of viral capsids?

What is the role of pericapsid in certain families of viruses?

What is the function of RNA-dependent RNA polymerase in negative-sense RNA viruses?

Which of the following is a requirement for a cell to be infected by a virus?

What is the difference between a productive and an abortive infection?

What is the period between the penetration of virus into cells and the maturation of viral progeny called?

Which of the following viruses has an ion channel protein in its envelope that causes acidification of endocytic vesicles containing the virus?

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