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Question
Write the characteristics of viruses.
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Solution
The various characteristics of viruses are:
- They are smaller and simpler than bacteria.
- They are ultramicroscopic and visible only under an electron microscope.
- They are considered to be on the boundary line of living and non-living things.
- They are obligate parasites and cannot live on their own.
- They cannot multiply on their own. They require living machinery to multiply.
- Viruses consist of genetic materials (DNA or RNA) surrounded by a protective coat of protein (capsid).
- Viruses are responsible for causing many dreadful diseases in plants, animals, and humans.
RELATED QUESTIONS
Match the organisms in Column A with their action in Column B.
| A | B | ||
| (i) | Bacteria | (a) | Fixing Nitrogen |
| (ii) | Rhizobium | (b) | Setting of curd |
| (iii) | Lactobacillus | (c) | Baking of bread |
| (iv) | Yeast | (d) | Causing Malaria |
| (v) | A protozoan | (e) | Causing Cholera |
| (vi) | A Virus | (f) | Causing AIDS |
| (g) | Producing antibodies |
Rewrite the following statement using correct of the option and explain the completed statement.
Process of -- -- -- -- of milk proteins occurs due to lactic acid.
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I have a nucleus and membrane-bound cell organelles.
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I can produce my replica.
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Microorganisms are measured in _______.
Mark the correct one as:
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Reason: The disease is transmitted by mosquito.
Name the four major groups of Microbes.
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