Chapter 19 Pre-Test Review

VIRUSES

Which is true about viruses? Are they free living, easily seen with a simple microscope, always pathogenic, or able to reproduce only in a living cell?

What is a host as it relates to a virus?

What are typical viruses made up of?

What is a capsid? What is it made up of?

Define a bacteriophage.

Be able to draw and label what is called the lytic cycle.

What is the correct sequence of events in the lytic cycle?

What name is given to how a virus enters a whole animal cell?

What is the correct sequence of events in the lysogenic cycle?

A virus (phage) that is quiet for many generations and then may become active is called temperate (t/f)?

What name is given for the virus' ability to alter the hosts genetic code?

Is it true that a pathogen could be harmful to either plants or animals?

What is a viroid?

Wendell Stanley's claim to fame?

T/F... Viruses attack particular plants and animals , or - viruses go from animal to animal- or- viruses cause rabies-or- viruses are always specific to a particular animal only.

What is an example of a common disease which undergoes the lysogenic cycle?

What does virulence mean?

What name do we give to the body's natural resistance to disease?

What is the body's first line of defense?

White blood cells are also known as ........cytes.

Do viruses represent an antigen or an antibody?

How is passive immunity acquired?

If you get a good case of the measles, you won't get them again. Whit kind of immunity is this referred to as?

In what part of the body are cilia and mucous membranes found?

Will mouse interferon work on a rabbit?

What genetic technique is employed to make quantities of human interferon?

ESSAY:

Why does getting a viral disease and recovering from it often mean life-long immunity from that disease?