Viruses

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 

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

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

What do viruses need to reproduce?

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

Reasons 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

Which can be treated with antibiotics?

• Virus
• Bacteria
• Mutagen
• Parasite

How does a virus cause a person to develop the common cold?

• invades the host cell to reproduce
• removes energy from the host cell
• produces toxins in the host cell
• protects the host cell from bacteria

A virus can be classified by its type of

• mitochondria
• chromosomes
• nucleic acid
• carbohydrates