During a single growth cycle experiment, the titer of extracellular and intracellular virus drops in the first hour.What explains this observation?

Question

Quizplus · Accepted Answer

The drop in titer of extracellular and intracellular virus suggests that the virus is successfully entering the cells and is being uncoated, causing a reduction in the number of infectious virus particles in the medium. This is a normal part of the viral replication cycle. Option A is unlikely as antibodies are not present in the first hour of the experiment, unless they were added intentionally. Option B is also unlikely as cellular enzymes typically act to help the virus replicate, not inactivate it. Option D is unlikely as the virus titer should still be detectable in the medium even if the virus is binding to the cells. Option E is also unlikely as the antiviral defenses of the cell would take time to activate, and would not be immediately effective in the first hour of the experiment.

During a Single Growth Cycle Experiment, the Titer of Extracellular