Asked in PMC Practice Test 13 (2021) 2021Moderate

Viruses are how much smaller than bacteria?

Correct answer: B. 10 to 1000 times

  • A. 20 to 2000 times
  • B. 10 to 1000 times
  • C. 500 times
  • D. 3000 times

Explanation

A virus ranges in size from 20-250 nanometers making them about a hundred times smaller than most bacteria. Since viruses are almost a hundred times smaller than most bacteria, they lie in this range hence this option is correct.

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About Viruses

Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.

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