Microbes in Human Welfare

Class 12 Biology Test Paper-02
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  • Question 1
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    Which of the following is widely used as a successful biofertiliser in Indian rice fields?

  • Question 2
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    Study the following statements and select the correct ones.


    (i) Methanogens are archaebacteria that produce methane in marshy areas.
    (ii) Nostoc is a filamentous blue-green alga that fixes atmospheric nitrogen.
    (iii) Many members of the genus Glomus form mycorrhiza.

  • Question 3
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    The product of which of the following organisms has been commercialized as blood cholesterol lowering agent is?

  • Question 4
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    Which of the following plants can act as a biofertilizer

  • Question 5
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    Nif - genes are introduced in 

  • Question 6
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    Which of the following pairs is wrongly matched?

  • Question 7
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    Cellulases and hemicellulases arc in great demand nowadays for the preparation of second-generation:

  • Question 8
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    Identify the odd one out ?

  • Question 9
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    Which one of the following is wrong statement?

  • Question 10
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    The microbial biofertilizers which can act both symbiotically and non-symbiotically to increases soil fertility are?

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