DHA Medical Licensing Exam Virology — practice questions
43 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice DHA Medical Licensing Exam Virology in the app →The porcelain Chamberland-Pasteur filter opened the way to the discovery of viruses. What did it do to a liquiWhat is a virion?In 1892 Dmitri Ivanowski showed that tobacco mosaic disease still spread after diseased plant juice received wWhich imaging method is the only one that reveals the internal structures of a virion?The protein subunits that build up a viral capsid carry which name?Which hypothesis about the origin of viruses proposes that they descend from free-living cells?The escapist hypothesis explains the origin of viruses by proposing that they began as what?Viruses built with a head and a tail infect which kind of host?Which host cell molecule does HIV use as one of its receptors?Compared with enveloped viruses, non-enveloped viruses stand up better to which group of conditions?What job do the matrix proteins of an enveloped virion perform?The outer envelope of an enveloped virus is built from membrane taken from where?Mutations appear more often in RNA viruses than in DNA viruses. Which property drives that difference?The Baltimore scheme sorts viruses according to which single feature?Who developed the most commonly used system of virus classification, and when?A single-stranded RNA genome of positive polarity behaves in which way once inside a host cell?Group VI viruses such as HIV carry diploid ssRNA genomes. How is that genome handled in the host cell?A double-stranded RNA virus generates its mRNA using which enzyme?Tobacco mosaic virus is long and cylindrical, which places it in which shape group?What name is given to a cell that a virus is actually able to use for replication?Which step of the virus replication cycle comes immediately after penetration?When a bacteriophage infects a bacterium, what becomes of the phage capsid?HIV leaves an infected immune cell by budding. What happens to that cell as the virions leave?Phage DNA that has been incorporated into a bacterial genome carries which name?T4 infects Escherichia coli of the human gut and bursts the cell open. Which replication cycle is that?Herpes simplex virus can sit silently in nerve tissue for years. Why is that state not called lysogeny?Entry by fusion of the viral coat with the plasma membrane is open to which viruses?Oncogenic viruses cause cancer by disturbing the host cell cycle in which way?Which pairing of virus and cancer is correct?Viruses may use which molecule as their genetic material?Viral vaccines may be prepared from which three kinds of material?What is the particular danger of giving a live attenuated viral vaccine?Why must an influenza vaccine be given again before every new season?Vaccination given after a bite from a rabid animal can still save the patient because of what?A viral protein is a safe drug target only if it has which property?Tamiflu treats influenza by inhibiting neuraminidase. What does that enzyme normally do?Why does HAART combine several anti-HIV drugs instead of relying on one?Which class of anti-HIV drug blocks the insertion of viral DNA into the host genome?Which molecule is completely absent from a prion?How does an incoming PrPsc molecule multiply itself inside the body?Kuru spread among people in Papua New Guinea through which practice?Viroids are best described as which kind of infectious particle?What does a viroid produce inside the plant cell it has infected?