Question

Virion size ranges from ______

1) 1-40 nm.
2) 10-400 nm.
3) 600-1,000 nm.
4) 1,000-10,000 nm.

Answer 1

Virion sizes typically range from 20 to 300 nm, but can be as large as 1000 nm for certain large virus species. Electron microscopy has enabled detailed observation of these small viral structures.

Step-by-step explanation:

Virion size ranges from 20-300 nanometers (nm) for typical viruses, though some can be larger. Most virions, or single virus particles, are very small, generally about 20 to 250 nm in diameter. However, large viruses such as Pandoravirus and Pithovirus species can reach sizes up to 1000 nm in diameter. With the advent of electron microscopy, we have been able to see these particles more closely, observing the detailed structure of viruses that would otherwise be invisible to a light microscope, such as bacteriophages and other viral structures.