Bacteria and Virus

Viruses are _______.

• producers
• consumers
• parasites
• decomposers

Cell in which a virus reproduces

• endospore
• host cell
• bacteriophage
• plasmid

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

Which of the following is one important difference between a virus and a bacterial cell?

• a virus is much larger in size than a bacterial cell
• a virus always causes more severe disease than a bacterial cell
• a virus can never reproduce on its own, but a bacterial cell can
• a virus does not contain genetic material, but a bacterial cell does

A virus can be classified by its type of

• mitochondria
• chromosomes
• nucleic acid
• carbohydrates

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

Which shape describes some bacterial cells?

• cube-shaped
• bullet-shaped
• spiral
• Robotlike

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.

One reason that viruses are considered to be nonliving is that they are not made of ______.

• protein
• viruses
• bacteria
• cells

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

• outer coat
• genetic material
• core
• cytoplasm