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.
A scientist observes that a certain virus can only infect liver cells in humans. What is the most likely explanation for this specificity?
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.
Which of the following best describes a virus? (1) A unicellular organism (2) A non-cellular infectious agent (3) A multicellular organism (4) A prokaryotic cell
Which of the following best explains why viruses are considered obligate intracellular parasites? (1) They can live independently (2) They require a host cell to reproduce (3) They have their own metabolism (4) They are always beneficial
Which of the following diseases is caused by a virus? (1) Tuberculosis (2) Malaria (3) Measles (4) Ringworm
Which of the following is a characteristic of viruses but not of living cells? (1) Ability to metabolize (2) Ability to reproduce independently (3) Presence of a capsid (4) Presence of organelles
Fill in the blank: The outermost layer of some viruses, derived from the host cell membrane, is called the ______.
Fill in the blank: The process by which a virus leaves the host cell by budding is called ______.
Fill in the blank: The process by which a virus transfers genetic material from one bacterium to another is called ______.
Fill in the blank: The protein subunits that make up the capsid are called ______.
True or False: All viruses are harmful to humans.
True or False: All viruses have an envelope.
True or False: All viruses have both DNA and RNA as their genetic material.
True or False: Prions are a type of virus.
