UNIT 1: Infectious disease

Organisms that cause disease are called __________________.

• hosts

• pathogens

• Phagocytes

• Flagellum

What is the smallest pathogen?

• protist

• bacteria

• virus

• fungi

A disease that can be passed from one person to another through pathogens.

• Communicable disease
• Noncommunicable disease

What sort of pathogen causes influenza (flu)?

• A bacterium
• A virus
• A fungus
• A protist

What do viruses need to reproduce?

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

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

• endospore
• decomposer
• plasmid
• bacteriophage

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

• outer coat
• genetic material
• core
• cytoplasm

Antibiotics kill viruses

• True
• False

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

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