Q. No.The vast majority of bacteria are:
1. Heterotrophs
2. Photoautotrophs
3. Chemosynthetic autotrophs
4. Methanotrophs
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| 1. | They are important decomposers. |
| 2. | They are helpful in making curd from milk, production of antibiotics and fixing nitrogen in legume roots. |
| 3. | Some are pathogens causing damage to human beings, crops, farm animals and pets. |
| 4. | Almost all help in recycling nutrients like nitrogen, phosphorus, iron and sulphur. |
Consider the given statements regarding slime moulds:
Statement I: Under unfavourable conditions they form a plasmodium.
Statement II: During favourable conditions, the plasmodium differentiates and forms fruiting bodies bearing spores at their tips.
Statement III: The spores bear true walls.
Statement IV: The spores are dispersed by water.
1. Only Statement I and Statement II are correct
2. Only Statement III is correct
3. All statements are incorrect
4. Only Statement III and Statement IV are correct
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Identify the incorrect statement regarding body organization in fungi:
1. With the exception of yeast, fungi are filamentous.
2. Their bodies consist of long slender hyphae that may be coenocytic or septate.
3. The network of hyphae is known as the mycelium.
4. The cell walls of fungi lack chitin and polysachharides.
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Which of the following is not used in asexual reproduction in fungi?
| 1. | Conidia | 2. | Sporangiospores |
| 3. | Zoospores | 4. | Ascospores |
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Consider the given two statements:
| I: | Mycoplasma are naturally resistant to antibiotics that target cell wall synthesis |
| II: | They are the smallest bacteria discovered yet |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
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The main criteria for classification used by Whittaker included all the following, except:
1. Cell structure and body organization
2. Mode of nutrition
3. Mode of reproduction
4. Mode of locomotion
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In Whittaker’s Five Kingdom classification, heterotrophic mode of nutrition is present in members of:
| 1. | Two kingdoms | 2. | Three kingdoms |
| 3. | Four kingdoms | 4. | Five kingdoms |
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Chemosynthestic autotrophic bacteria:
I. Produce ATP by oxidizing inorganic substances
II. Play a great role in recycling nutrients like nitrogen, phosphorus, iron and sulfur
| 1. Both I and II are correct | 2. Only I is correct |
| 3. Only II is correct | 4. Both I and II are incorrect |
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Halophiles are archaebacteria adapted to extreme:
| 1. | Hot habitats | 2. | Saline habitats |
| 3. | Marshy habitats | 4. | Cold habitats |
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