Viruses
Biology ⇒ Microorganisms and Microbiology
Viruses starts at 7 and continues till grade 12.
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See sample questions for grade 12
A scientist observes that a certain virus can only infect liver cells in humans. What is the most likely explanation for this specificity?
Describe one way in which antiviral drugs can inhibit viral replication.
Describe the main steps involved in the replication of a typical animal virus.
Describe the role of host specificity in viral infections.
Describe the role of surface proteins in viral infection.
Explain how mutation in viral genomes can lead to the emergence of new viral strains.
Explain the difference between the lytic and lysogenic cycles of viral replication.
Explain why antibiotics are ineffective against viruses.
Explain why some viruses can cause cancer in humans.
Name one method used to prevent viral infections in humans.
Name the enzyme that retroviruses use to synthesize DNA from their RNA genome.
Name the protein coat that surrounds the genetic material of a virus.
What is the main difference between a naked virus and an enveloped virus?
What is the main function of the viral envelope?
A patient is diagnosed with a persistent viral infection where the virus remains dormant within host cells and can reactivate later. Name this type of infection and provide an example of a virus that exhibits this behavior.
A researcher is studying a virus that can only replicate in the presence of another 'helper' virus. What is the term for such a virus, and provide an example.
Compare and contrast the mechanisms of entry of enveloped and non-enveloped viruses into host cells.
Describe how the CRISPR-Cas system in bacteria provides immunity against viral infections.
Explain the process of antigenic shift in influenza viruses and discuss its significance in the emergence of pandemics.
Explain why RNA viruses generally have higher mutation rates than DNA viruses.
