Biological Viruses - Quiz - Biology Articles, Tutorials & Dictionary Online

Quiz

Choose the best answer.

1. How do viruses reach their host?

Through inhalation of contaminated air

Through blood transfusion

Ingestion of contaminated food or water

All of the above

2. What is a bacteriophage?

A bacterium that infects a virus

A virus that infects a bacterium

A host cell harboring a bacterium

None of the above

3. What is the role of the "tail" of a virus in the infection process?

It provides a means to thrust its genetic information into the host cell.

It stimulates the host cell to create a protein coat for the virus.

It uses it to puncture the host cell and thereby creating a point of entry for other viruses.

All of the above

4. Why does a virus need a host cell?

It uses the host cell's genetic machinery to reproduce and survive.

It uses the host cell's transport system for transmission.

Its host cell is used as a hiding place from bacteria and other cells.

None of the above

5. Why is a virus likened to an obligate parasite?

It may or may not need a host cell to replicate itself.

It cannot thrive without its host.

It remains attached to the plasma membrane of the host cell.

All of the above

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