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Earn 100
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.
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Important Questions on Five Kingdom Classification
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Identify the parts labelled in the given figure
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(A) No virus contains both DNA and RNA.
(B) Viroids were named by Pasteur.
(C) Scrapie disease of sheep is caused by proteins.
(D) In the six kingdom classification three domains are present.
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Match the following lists:
| List | List | ||
| A) | No sex organs, dikaryotic exogenous spores | Gonyaulax | |
| B) | Infectious agents without nucleic acids | Trichodesmium | |
| C) | Differentiated cytoplasm bloom in polluted water bodies | Slime moulds | |
| D) | Fruiting bodies bearing spores survive many years | Basidiomycetes | |
| Prions |
The correct match is
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Reason (R): Bacterial plasmids have very high copy numbers of their genome in the bacterial cells.
The correct option among the following is:
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(i) It causes potato spindle tuber disease
(ii) These are infections RNA particles
(iii) It lacks the protein coat
(iv) The molecular weight of its RNA is low
The above statements are assigned to
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