Virus Quiz

How does a virus' size compare to the size of a bacterium?

• Viruses are smaller than bacteria.

• Viruses are larger than bacteria.

• Viruses are about the same size as bacteria.

• The size of a virus can vary. Some are much larger than bacteria; others are much larger.

What is the name of the protein coat surrounding a virus?

• capsule

• envelope

• capsid

• spike

What do some viruses have that enable them to invade a host cell?

• DNA

• RNA

• capsule

• spike genes

Viruses can contain _____.

• DNA only.

• RNA only.

• either DNA or RNA, but not both.

• usually both DNA and RNA.

What is the name of the outer layer that SOME viruses have surrounding their protein coats?

• capsids

• capsules

• cell walls

• envelopes

Some viruses can infect only specific types of bacteria. Other viruses have a broad range of hosts that they can infect. This is called a virus' __________.

• host cells

• target tissues

• host range

• vector

Which of the following is TRUE of viruses?

• Viruses maintain homeostasis.

• Viruses can grow when inside of a host cell.

• Viruses have metabolism, but only inside of a host cell.

• Viruses can only reproduce inside once inside of a host cell.

Which type of virus has a high mutation rate?

• DNA virus

• RNA virus

• Bacteriophage

• Virion

Viruses are obligate intracellular parasites because they

• kill their host cells.

• sometimes need a host cell in order to reproduce.

• live inside of human beings.

• always require a host cell in order to be able to reproduce

What do viruses use to identify hosts?

• They puncture the host with their spikes.

• They dock with receptors on a cell's surface.

• They use their DNA to integrate with a host's DNA.

• The host is usually random.