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Microbiology Basics Questions and Answers

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Which is largest virus?
Mimivirus is the largest and most complex virus known. Is it an evolutionary
bridge between nonliving viruses and living organisms, or is it just an anomaly?

Which is smallest virus?
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)

What is the largest known cell?
"Caulerpa is a unique organism," said Chitwood. "It's a member of the green
algae, which are plants. Remarkably, it's a single cell that can grow to a length of six
to twelve inches.

What is the biggest germ?
Thiomargarita namibiensis. Thiomargarita namibiensis is a very unique
bacteria because not only does it live where most bacteria cannot survive it is the
largest bacteria ever found. It took the record of the largest bacteria from
Epulopiscium fishelsoni by being one hundred times larger.

What are two types of cells?

There are two distinct types of cells: prokaryotic cells and eukaryotic cells.
Who first discovered cell?
The cell was first discovered and named by ROBERT HOOKE in 1665. He
remarked that it looked strangely similar to cellula or small rooms which monks
inhabited, thus deriving the name. However what Hooke actually saw was the dead
cell walls of plant cells (cork) as it appeared under the microscope.

Who found cells in teeth?
A pedodontist, Dr. Songtao Shi, discovered baby tooth stem cells while he
used the deciduous teeth of his six-year-old daughter in 2003 and he named the
cells as stem cells from the human exfoliated deciduous teeth (SHED).

What is the first virus?

Tobacco plants are damaged sometimes with mosaic-like patterns on the leaves.
These patterns are caused by the tobacco mosaic virus, which at the end of the 19th
century became the first virus ever discovered

What was the first disease discovered?
After tobacco mosaic was recognized as a virus disease, virus infections of many
other plants were discovered. The importance of tobacco mosaic virus in the history
of viruses cannot be overstated. It was the first virus to be discovered, and the first to
be crystallised and its structure shown in detail.

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