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. 161 The production of acetic acid from ethanol is an
   

   1. anaerobic process

   2. aerobic process

   3. a combination of both

   4. none of the above

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   Added By: Admin

   Answer

   : aerobic process

   Explanation

   :
   N/A

2. 162 Chlorotetracycline a broad spectrum antibiotic is produced by
   

   1. Streptomyces aureofaciens

   2. Streptomyces rimosus

   3. Streptomyces venezuelae

   4. Streptomyces erythreus

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   Answer

   : Streptomyces aureofaciens

   Explanation

   :
   N/A

3. 163 The organism which utilizes the pentose of sulphite waste liquor for lactic acid production is
   

   1. Streptococcus lactis

   2. Lactobacillus bulgaricus

   3. Lactobacillus casei

   4. Lactobacillus pentosus

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   Answer

   : Lactobacillus pentosus

   Explanation

   :
   N/A

4. 164 Which of the following micro organism utilizes lactose as a carbon source in production of lactic acid from whey media?
   

   1. Lactobacillus bulgaricus

   2. Lactobacillus delbrueckii

   3. Lactobacillus pentosus

   4. Leuconostoc mesenteroides

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   Answer

   : Lactobacillus bulgaricus

   Explanation

   :
   N/A

5. 165 The rapid process of microbial oxidation developed to produce acetic acid from ethanol at Schutzenbach, Germany is also known as
   

   1. packed generator

   2. trickle method

   3. Orleans process

   4. both (a) and (b)

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   Answer

   : both (a) and (b)

   Explanation

   :
   N/A

6. 166 Rickes et al. recovered active crystalline vitamin B12 from the culture of
   

   1. Streptomyces griseus

   2. Bacillus megaterium

   3. Streptomyces olivaceus

   4. Streptomyces lactis

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   Answer

   : Streptomyces griseus

   Explanation

   :
   N/A

7. 167 Riboflavin is a by-product of __________ fermentation carried out by Clostridium spp.
   

   1. citric acid

   2. acetone butanol

   3. streptomycin

   4. ethanol

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   Answer

   : acetone butanol

   Explanation

   :
   N/A

8. 168 The aerated submerged bacterial fermentation to produce vitamin B12 employs strains of
   

   1. Propionibacterium

   2. Pseudomonas

   3. Acetobacter

   4. both (a) and (b)

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   Answer

   : both (a) and (b)

   Explanation

   :
   N/A

9. 169 Which of the following is a heterofermentative micro-organism?
   

   1. Leuconostoc mesenteroides

   2. Lactobacillus delbrueckii

   3. Lactobacillus bulgaricus

   4. Lactobacillus pentose

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   Answer

   : Lactobacillus delbrueckii

   Explanation

   :
   N/A

10. 170 The major organism used in the microbial production of citric acid is
    

    1. Penicillin notatum

    2. Rhizopus nigrificins

    3. Aspergillus niger

    4. Lactobacillis delbrueckii

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    Added By: Admin

    Answer

    : Aspergillus niger

    Explanation

    :
    N/A