Viruses

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

Which is bigger, a bacteria or a virus?

• Bacteria
• Virus

Most bacteria are surrounded by a strong structure that acts like a shield for the virus called the…?

• Cell Wall

• Cell Membrane

• Capsid

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

• Surgery
• Medication
• Vaccines

Antibiotics kill viruses

• True
• False

When a virus invades a living cell, its _______
takes over the cell's functions.

• outer coat
• genetic material
• core
• cytoplasm

Tags

NGSS.MS-LS1-2

Needs host cell to reproduce.

• Virus
• Bacteria
• Fungus
• Protozoan