Virus Structure and Life Cycle

Which statement regarding viruses is true?

• a virus can only reproduce inside of a living cell
• viruses do not contain DNA
• viruses are unicellular
• viruses are generally larger than cells

The reason that viruses are considered to be nonliving is because

• They are not cellular
• They cannot reproduce on their own
• They cannot make proteins
• all of the above

A capsid is

• a structure that directly causes cell lysis
• the type of virus that attacks bacteria
• the genetic material of a virus
• the protein coat of a virus

Viruses are cells. 

• True 
• False

What happens in the lytic cyle?

• Virus goes in and leaves the host cell
• Virus quickly kills the host cell
• Virus sleeps inside of the host cell
• Virus stay dormant for a long time

What is one way that a lysogenic infection differs from a lytic infection?

• A lysogenic virus does not act on bacteria as a lytic virus does.
• A lysogenic virus can remain in the host DNA for a longer period without becoming active.
• A lysogenic virus contains RNA instead of DNA.
• A lysogenic virus directs the production of new viruses right away.

Viruses are shaped like

• spheres

• cubes

• a diamond shape with tail fibres

• all of these

A virus's genetic material is surrounded by

• a protein capsid

• DNA

• a tail fiber

• nothing

What is the first step to both cycles?

• The virus attaches to a host

• the virus injects genetic material

• the host gets sick

• the cell is destroyed

What happens to cells when their membranes break apart?

• The virus dies

• The virus destroys and damages a host cell

• the capsid bursts

• the virus becomes dormant