Biology MCQs with Answers

This is Biology MCQs section with detailed explanations for preparation of screening tests, interviews for government jobs. In this section candidate will learn MCQs on variety of topics from the subject.

1. 121 The immediate precursor for glumatic acid production by Corynebacterium glutamicum is
   

   1. lysine

   2. oxoacetate

   3. citrate

   4. 2-oxo-glutarate

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   Added By: Admin

   Answer

   : 2-oxo-glutarate

   Explanation

   :
   N/A

2. 122 Which of the following microorganism can yield vitamin B12 using methanol as a carbon source?
   

   1. Methanobacterium soehngenii

   2. Methanobacillus omelianski

   3. Protaminobacter ruber

   4. All of the above

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   Answer

   : All of the above

   Explanation

   :
   N/A

3. 123 Glucoseoxidase, which had been commercially employed to remove glucose from egg white and whole eggs before drying is obtained by submerged aerated fermentation using
   

   1. A. niger

   2. B. subtilis

   3. B. cereus

   4. A.flavus

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   Answer

   : A. niger

   Explanation

   :
   N/A

4. 124 Which of the following is true about ?-ionone, non-ionic detergent used in ? carotene fermentation medium?
   

   1. It is a precursor of ?-carotene fermentation process

   2. It is regarded as "steering" factor associated with bringing about the presence and activity of the enzymes responsible for ?-carotene formation

   3. It is an inducer of ? carotene fermentation process

   4. None of the above

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   Answer

   : It is regarded as "steering" factor associated with bringing about the presence and activity of the enzymes responsible for ?-carotene formation

   Explanation

   :
   N/A

5. 125 The organisum used for production of streptomycin is
   

   1. Streptomyces rimosus

   2. Streptomyces griseus

   3. Streptomyces aureofaciens

   4. Streptomyces erythreus

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   Answer

   : Streptomyces griseus

   Explanation

   :
   N/A

6. 126 The method used for obtaining citric acid as fermentation product are commonly known as
   

   1. submerged aerated fermentation

   2. stationary tray fermentation

   3. both (a) and (b)

   4. none of these

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   Answer

   : both (a) and (b)

   Explanation

   :
   N/A

7. 127 Invertase has its application in confectionaries to prevent crystallization of sugar. It is obtained from
   

   1. A. oryzae

   2. A. niger

   3. S. cerevisae

   4. B. subtilis

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   Answer

   : S. cerevisae

   Explanation

   :
   N/A

8. 128 In Corynebacterium glutamicum, tryptophan biosynthesis is regulated by the activity of
   

   1. DAHP synthetase

   2. Anthranilate synthase

   3. Both (a) and (b)

   4. Phosphoenol pyruvate

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   Answer

   : Both (a) and (b)

   Explanation

   :
   N/A

9. 129 Bacillus thuringiensis is useful as a bacterial
   

   1. source of antibiotics

   2. producer of vitamins

   3. herbicide

   4. pesticide

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   Answer

   : pesticide

   Explanation

   :
   N/A

10. 130 Flavor can be enhanced from the
    

    1. L-Alanine

    2. D-L-Alanine

    3. L-Aspartic acid

    4. all of these

    See Answer

    Added By: Admin

    Answer

    : all of these

    Explanation

    :
    N/A