Chapter 20 Checkpoint

A disease causing organism

• pathogen
• poison
• vaccine
• lyctic

Bacteria cells are classified as

• Eukaryotes
• Prokaryotes
• Viruses
• A Host

Bacteria are prokaryotes which means they

• have a nucleus on their capsule
• do not contain a nucleus
• can live in environments with and without oxygen
• they don't have DNA

Needs host cell to reproduce.

• Virus
• Bacteria
• Fungus
• Protozoan

Which of the following is not a way to prevent or treat viruses?

• antibiotics
• antiviral medications
• vaccines
• wash your hands

You have a cold, but your doctor will not give you an antibiotic, because

• antibiotics do not kill viruses.
• colds are not infectious.
• antibiotics make colds worse.
• antibiotics provide bacteria with food.

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

• outer coat
• genetic material
• core
• cytoplasm

A(n) _____ is a virus that enters a bacterial cell.

• endospore
• decomposer
• plasmid
• bacteriophage

A tiny non-living particle that invades and then multiplies inside of a living cell is called a:

• vaccine
• virus
• bacteriophage

How could you describe the size of a virus?

• Smaller than bacteria
• Larger than a parasite
• About the size of a dime
• Smaller than a proton