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  4. In Beijerinek's experiment, what did he call the infectious fluid that he extracted from diseased tobacco plants?

Q. In Beijerinek's experiment, what did he call the infectious fluid that he extracted from diseased tobacco plants?

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Solution:

M.W. Beijerinek (1898) demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants and called the fluid as Contagium vivum fluidum (infectious living fluid). W.M. Stanley (1935) showed that viruses could be crystallised and crystals consist largely of proteins. They are inert outside their specific host cell. Viruses are obligate parasites