Acellular Infectious Agents

Which of the following is NOT true about the damage done to a host by a virus?

• Caused by toxin secretion

• Caused by direct cell lysis

• Caused by immune response

• Caused by viral replication

What is the term for a virus that integrates its genetic material into the host's genome?

• Lysogen

• Bacteriophage

• Retrovirus

• Phage

What is the difference between a virus and a prion?

• Viruses contain nucleic acids; prions are misfolded proteins.

• Viruses are larger than prions; prions are smaller than viruses.

• Viruses can reproduce independently; prions cannot reproduce at all.

• Viruses are made of proteins; prions contain DNA.

What is a cytopathic effect?

• Damage to host cells caused by viral infection.

• A type of immune response to bacterial infection.

• An increase in cell division due to growth factors.

• A process of cell repair after injury.

Do all enveloped viruses leave their host by budding?

• True

• False

• Only some enveloped viruses do

• Enveloped viruses do not leave by budding

Chemically, prions are ___________.

• Nucleic acids

• Lipids

• Proteins

• Carbohydrates

What is the role of spike proteins on a virus?

• To facilitate attachment to host cells

• To protect the virus from the immune system

• To help the virus replicate inside the host

• To provide energy for the virus

What are the two main types of nucleic acids found in viruses?

• DNA and RNA

• Protein and Lipid

• Carbohydrate and DNA

• RNA and Protein

What is the immune response's role in viral infections?

• To eliminate infected cells and produce antibodies.

• To enhance viral replication.

• To suppress the immune system.

• To promote inflammation without targeting the virus.

What is the protective protein shell of a virus that encloses DNA or RNA?

• Capsid

• Envelope

• Nucleocapsid

• Peptidoglycan