Practise PMC National MDCAT Biology practice MCQs in sets of about 20 questions with instant answers and explanations. This page focuses on mixed practice se…
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Q1. A researcher extracts sap from an infected tobacco plant and passes it through a porcelain filter. Which organism would still be present in the filtrate?
Answer: Tobacco Mosaic Virus
Q2. During the assembly of an Adenovirus particle, how many individual protein subunits or capsomeres are required to form its icosahedral capsid?
Answer: 252 capsomeres
Q3. A clinician observes a virus that acquires its outer lipid bilayer from the host cell's nuclear membrane. This characteristic is diagnostic of which viral group?
Answer: Herpes virus
Q4. In a laboratory culture of E. coli, a viral genome integrates into the bacterial chromosome and replicates along with it. What is this integrated viral DNA termed?
Answer: Prophage
Q5. A patient is diagnosed with an RNA virus that uses an enzyme to synthesize a DNA template. Which enzyme is essential for this specific viral replication?
Answer: Reverse transcriptase
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