BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Virus
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Bacteria
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Either A or B
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None of the above
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Detailed explanation-1: -AAV is the smallest DNA virus with an average size of 20 nm. AAV was discovered in 1965 as a defective contaminating virus in an adenovirus stock (Atchison et al., 1965).
Detailed explanation-2: -Bacteria are giants when compared to viruses. The smallest bacteria are about 0.4 micron (one millionth of a meter) in diameter while viruses range in size from 0.02 to 0.25 micron.
Detailed explanation-3: -For some context, one of the smallest viral genomes is around 5, 000 base pairs in length [6]. Pandoravirus salinus is a giant virus with a genome approximately 2.5 million base pairs in length [7].
Detailed explanation-4: -And viruses are smaller again-they’re about a hundredth the size of our cells. So we’re about 100, 000 times bigger than our cells, a million times bigger than bacteria, and 10 million times bigger than your average virus!