Bacteria and Viruses

Can a virus change the normal activity of a cell?

• No
• Maybe
• Yes

Is a virus considered living or non-living?

• Living
• Non-Living
• Neither

What is a host?

• Organism that lives on the cell and causes it harm 
• Something that causes harm to the cell 
• Cell that the virus invades and takes over

Why do scientists classify viruses as non-living?

• They DO respond to a stimulus
• They need a host's energy because they do not have their own energy 
• They produce wastes
• They are really small 

What is the first step of the virus reproduction cycle?

• The viruses genetic material (DNA) starts to take over the functions of the cell
• The host cell bursts open, releasing the new viruses
• The virus injects its genetic material into the cell
• A virus attaches to the surface of a host cell

What is the last step in the viral reproduction cycle?

• A virus attaches to the surface of a host cell
• The proteins and genetic material start to assemble in the cell
• The host cell bursts open, releasing the new viruses
• The virus injects its genetic material into the cell

Where do viruses reproduce?

• Outside of a cell
• Inside of a cell
• They do not reproduce

Which of the following helps prevent the spread of infectious diseases?

• Surgery
• Medication
• Vaccines

What do viruses need to reproduce?

• they need genetic material
• They need a host cell
• They need  bacteria
• They need insulin

True or False
The flu is caused by a virus.

• true
• false