Practice question

MCQ

Question

Which sequence correctly arranges the major discoveries associated with tobacco mosaic virus from earliest to latest?

Options

Choose one · Correct answer highlighted

Ivanowsky recognised the filterable agent â Beijerinck demonstrated infectivity of the extract â Stanley crystallised viruses Correct Stanley crystallised viruses â Ivanowsky recognised the filterable agent â Beijerinck demonstrated infectivity Beijerinck demonstrated infectivity â Stanley crystallised viruses â Ivanowsky recognised the filterable agent Diener discovered viroids â Ivanowsky recognised the filterable agent â Stanley proposed five kingdoms

Explanation

Ivanowsky recognised the filterable agent causing tobacco mosaic disease in 1892. Beijerinck showed in 1898 that infected plant extract could infect healthy plants. Stanley demonstrated in 1935 that viruses could be crystallised.

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