Virus Structure and Life Cycle Quiz

Which of the following best describes a virus?

• A living cell with a nucleus

• A particle made of nucleic acid and protein coat

• A single-celled prokaryote

• A multicellular organism

List the two main components found in all viruses.

Which of the following is the correct order of virus size (from smallest to largest)?

• Viruses < Bacteria < Animal cells

• Bacteria < Viruses < Animal cells

• Animal cells < Viruses < Bacteria

• Viruses < Animal cells < Bacteria

Name the shape of the tobacco mosaic virus (TMV) and describe one key structural feature.

In a bacteriophage, identify the following parts: The region that stores genetic material. The structure used to attach to bacterial surfaces.

In an influenza virus, what role do the protein spikes play?

During the lytic cycle, the step where viral DNA is injected into the host cell is called:

• Attachment

• Penetration

• Assembly

• Release

Name the five main stages of the lytic cycle in order.

In the lysogenic cycle, viral DNA:

• Immediately causes the host to burst

• Remains inactive by integrating into the host DNA

• Floats freely without replication

• Is destroyed by the host’s enzymes

In the lysogenic cycle, the host cell continues to live and divide normally while carrying the viral DNA.