Who purified filterable agents for the first time?
Correct answer: D. Stanley
- A. Charles Chamberland
- B. Ivanowski
- C. Louis Pasteur
- D. Stanley
Explanation
Wendell Meredith Stanley was the first to purify a virus, specifically the Tobacco Mosaic Virus (TMV) in 1935. He showed that TMV could be crystallized like a chemical and still remain infectious, which was a major breakthrough. This discovery helped prove that viruses were distinct from other microorganisms and opened the door to modern virology.
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