Biology miscellaneous


  1. The ambient air quaility standard (24 hours’ average) for lead in industrial area is









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    The ambient air quality standard (24 hours’ average) for lead in industrial area is 1.5 µg/m3

    Correct Option: D

    The ambient air quality standard (24 hours’ average) for lead in industrial area is 1.5 µg/m3


  1. Time required for the organism to eliminate 50% the total body burden or tissue concentration of chemical is referred as









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    Time required for the organism to eliminate 50 per cent of the total body burden or tissue concentration of chemical is referred to as Half Life Period.

    Correct Option: D

    Time required for the organism to eliminate 50 per cent of the total body burden or tissue concentration of chemical is referred to as Half Life Period.



  1. Protein part of enzyme is know as









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    Enzymes are defined as biological catalysts. Chemically all enzymes are globular proteins. Each enzyme catalyses only one chemical reaction. Protein part of enzyme is known as Apoenzyme.

    Correct Option: C

    Enzymes are defined as biological catalysts. Chemically all enzymes are globular proteins. Each enzyme catalyses only one chemical reaction. Protein part of enzyme is known as Apoenzyme.


  1. Which base in place of thymine is present in RNA ?









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    DNA (Deoxyribonucleic acid) contains 2-deoxyribose sugar. It contains cytosine and thymine as pyrimidine bases and guanine and adenine as purine bases. RNA (Ribonucleic acid) contains ribose sugar. It contains cytosine and uracil as pyrimidine bases and guanine and adenine as purine bases.

    Correct Option: C

    DNA (Deoxyribonucleic acid) contains 2-deoxyribose sugar. It contains cytosine and thymine as pyrimidine bases and guanine and adenine as purine bases. RNA (Ribonucleic acid) contains ribose sugar. It contains cytosine and uracil as pyrimidine bases and guanine and adenine as purine bases.



  1. Smut of wheat is coused by









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    Smut of wheat is caused by Ustilago tritici.

    Correct Option: C

    Smut of wheat is caused by Ustilago tritici.