When was the Tobacco Mosaic Virus successfully crystalized?
Correct answer: A. 1935
- A. 1935
- B. 1930
- C. 1932
- D. 1920
Explanation
Tobacco mosaic virus was the first virus to be crystallized. It was achieved by Wendell Meredith Stanley in 1935 who also showed that TMV remains active even after crystallization. So, option A is correct.
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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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