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General Virology: Viruses Infecting Organisms

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General Virology: Viruses Infecting Organisms

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Questions and Answers

What is the size range of viruses?

1-10 µm

20-300 nm (correct)

500-1000 nm

5-15 µm

How do viruses differ from bacteria in terms of nucleic acid content?

Viruses contain both DNA and RNA in equal proportions.

Viruses contain no nucleic acid.

Viruses contain a combination of bacterial and viral nucleic acids.

Viruses contain only one type of nucleic acid (either DNA or RNA), never both. (correct)

What is the metabolic activity of viruses outside host cells?

Viruses have NO metabolic activity outside the host cells. (correct)

Viruses have metabolic activity only inside host cells.

Viruses have metabolic activity independent of host cells.

Viruses have metabolic activity similar to bacteria.

What is the defining characteristic of bacteriophages?

They are Bacterial Viruses. Signup and view all the answers

How do viruses replicate inside living cells?

Viruses direct the host cell metabolism to form new copies of viral genes and viral proteins. Signup and view all the answers

What differentiates pox viruses from other viruses in terms of visibility?

They can be seen without an electron microscope Signup and view all the answers

What is the unique characteristic of the genome of viruses?

Contain only one type of nucleic acid (either DNA or RNA), never both Signup and view all the answers

What is the metabolic activity of viruses outside host cells?

They have no metabolic activity outside host cells Signup and view all the answers

What is the size range of most viruses?

(20-300 nm) Signup and view all the answers

What is the replication characteristic of viruses inside living cells?

Can replicate only inside living cells and do not divide by binary fission Signup and view all the answers

Study Notes

Virus Characteristics

Viruses range in size from 20-400 nanometers (nm) in diameter.
Viruses differ from bacteria in that they have a single type of nucleic acid (either DNA or RNA) while bacteria have both DNA and RNA.

Metabolic Activity

Viruses are metabolically inert outside host cells, meaning they do not carry out metabolic activities such as energy production or protein synthesis.

Bacteriophages

Bacteriophages are a type of virus that specifically infect bacteria.

Replication

Viruses replicate inside living cells by hijacking the host cell's machinery to produce more viral particles.

Pox Viruses

Pox viruses are unique in that they can be seen under a light microscope, which is not possible with other viruses due to their smaller size.

Genome Characteristics

The genome of viruses is unique in that it can be composed of either DNA or RNA, but not both.

Size Range

Most viruses range in size from 20-400 nm in diameter.

Replication Characteristics

Viruses replicate inside living cells by producing multiple copies of their genome and assembling new viral particles.

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Description

Test your knowledge about viruses and their ability to infect various organisms in nature. This quiz covers the properties of viruses and their differentiation from bacteria.