Plasma from a sick mouse is filtered across a membrane that has a 200 nm pore size.If the filtrate is still infectious when injected into a healthy mouse, then the pathogen is most likely a(n):
A)bacterium
B)archaean
C)fungus
D)virus

Question

Quizplus · Accepted Answer

Viruses are much smaller than 200 nm and can pass through such a filter, whereas bacteria, archaea, and fungi are generally larger and would be retained by the filter.

Plasma from a Sick Mouse Is Filtered Across a Membrane