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प्रश्न
Which are the different types of micro-organisms?
उत्तर
Microorganisms can be divided into 5 major groups, like:
Bacteria are the most primitive and diverse unicellular organisms found in the living world. They are prokaryotic in nature as their genetic material, i.e., DNA, is not enclosed within a nuclear membrane. Because of their unique biochemical pathways and properties, they are of high economic importance to human beings.
Fungi- Fungi is a group of eukaryotic, unicellular, as well as multicellular, non-photosynthetic organisms that includes mushrooms, moulds and yeasts. These organisms have a rigid cell wall made up of chitin and are found in diverse shapes and sizes.
Algae- Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis.
Protozoa- Protozoa are a group of unicellular micoorganisms that are non photosynthetic in nature. Many protozoa cause disease in animals and humans.
Viruses- Viruses are ultramicroscopic and non-cellular organisms. They have a simple structure, having genetic material coated by a protein coat. They are obligate parasites and highly pathogenic.
संबंधित प्रश्न
The most common carrier of communicable diseases is ___________.
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 |
Match the pairs
‘A’ group | ‘B’ group | ||
a. | Xylitol | 1. | Pigment |
b. | Citric acid | 2. | To impart sweetness |
c. | Lycopene | 3. | Microbial restrictor |
d. | Nycin | 4. | Protein binding emulsifier |
5. | To impart acidity |
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Tomato wilt is a viral disease.
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I have a nucleus and membrane-bound cell organelles.
What are micro-organisms?
Give reasons.
A refrigerator is used in almost every home.
‘Cry’ protein is produced by the bacteria ______.
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