Viruses · Paper 1 — Free Biology HL Practice Questions

A virus has an outer lipid envelope with spike proteins, a protein capsid, and a single-stranded RNA genome. A student claims this virus is released from its host cell by lysis rather than by budding. Which feature of this virus most directly contradicts the student's claim?

A virologist isolates a bacteriophage that completes a lytic cycle in 30 minutes. When a chemical that specifically inhibits the phage-encoded DNA polymerase is added at the start of infection, no new phage particles are produced and no bacterial lysis occurs. Which of the following conclusions is best supported by these results?