Discussion
Compared with a bacterial cell, a typical virion is
Answer: A
Correct answer: very much smaller
Virions run from about twenty to a few hundred nanometres, against one to several micrometres for a bacterium - roughly one to two orders of magnitude smaller in each dimension. That is why viruses pass filters that retain bacteria and why they cannot be seen in the light microscope, both facts being how they were first recognised.
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