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. 1131 Types of exotoxin, most commonly associated with botulism in man, is/are?
   

   1. Type A

   2. Type B

   3. Type E

   4. All of these

   See Answer

   Added By: Admin

   Answer

   : All of these

   Explanation

   :
   N/A

2. 1132 Nagler's reaction is useful for the identification of
   

   1. C tetani

   2. C perfringens

   3. C botulinum

   4. C difficile

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   Answer

   : C perfringens

   Explanation

   :
   N/A

3. 1133 Which of the following is predominantly proteolytic?
   

   1. C. sporogenes

   2. C. histolyticum

   3. Both (a) and (b)

   4. C. speticum

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   Answer

   : Both (a) and (b)

   Explanation

   :
   N/A

4. 1134 Crystal violet blood agar is a selective medium for
   

   1. ?-haemolytic streptococci

   2. Staphylococcus aureus

   3. Corynebacterium diphtheriae

   4. Mycobacterium tuberculosis

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   Answer

   : ?-haemolytic streptococci

   Explanation

   :
   N/A

5. 1135 Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?
   

   1. Type A

   2. Type B

   3. Type C

   4. Type D

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   Answer

   : Type A

   Explanation

   :
   N/A

6. 1136 The bacterial sore throat is caused by
   

   1. Staphylococcus aureus

   2. Haemophilus spp

   3. Streptococcus pyogenes

   4. Mycoplasma pneumoniae

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   Answer

   : Streptococcus pyogenes

   Explanation

   :
   N/A

7. 1137 Which of the following test(s) may establish retrospective diagnosis of streptococcal infection?
   

   1. Anti-DNase B test

   2. ASO test

   3. Streptozyme test

   4. All of these

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   Answer

   : All of these

   Explanation

   :
   N/A

8. 1138 Individuals suffering from primary atypical pneumonia have agglutinins to
   

   1. Streptococcus MG

   2. S avium

   3. S mutans

   4. Enterococcus faecalis

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   Added By: Admin

   Answer

   : Streptococcus MG

   Explanation

   :
   N/A

9. 1139 Streptolysin O is
   

   1. antigenic

   2. oxygen-labile

   3. heat-labile

   4. all of these

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   Added By: Admin

   Answer

   : all of these

   Explanation

   :
   N/A

10. 1140 Cell wall protein of Streptococcus pyogenes crossreacts with human
    

    1. synovial fluid

    2. cardiac valves

    3. myocardium

    4. vascular intima

    See Answer

    Added By: Admin

    Answer

    : myocardium

    Explanation

    :
    N/A