1. Tardigrade
  2. Question
  3. Biology
  4. Which of the following scientist's contributions to viruses is correctly matched? I. M.W. Beijerinek demonstrated that the extract of the infected plants of tobacco mosaic could cause infection in healthy plants and called the fluid as contagium vivum fluidum (infectious living fluid). II. W.M. Stanley showed that viruses could be crystallized and crystals consist largely of proteins. III. The name virus that means venom or poisonous fluid was given by Dmitri Ivanowsky.

Q. Which of the following scientist's contributions to viruses is correctly matched?
I. M.W. Beijerinek demonstrated that the extract of the infected plants of tobacco mosaic could cause infection in healthy plants and called the fluid as contagium vivum fluidum (infectious living fluid).
II. W.M. Stanley showed that viruses could be crystallized and crystals consist largely of proteins.
III. The name virus that means venom or poisonous fluid was given by Dmitri Ivanowsky.

 2170  230 NTA AbhyasNTA Abhyas 2020Biological Classification Report Error

Solution:

The name virus, that means venom or poisonous fluid, was given by Dmitri Ivanowsky (1892). He recognized certain microbes as the causal organisms of the mosaic disease of tobacco. These were found to be smaller than bacteria because they passed through bacteria-proof filters. 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 crystallized and crystals consist largely of proteins.