Which of the following diseases is caused by the bacterium Clostridium tetani? MCQ with Answer and Explanation

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Which of the following diseases is caused by the bacterium Clostridium tetani?

A. Pertussis (whooping cough)

B. Diphtheria

C. Tetanus

D. Botulism

Answer: Option C

Solution (By JKSSB Mock Tests)

Tetanus (lockjaw) is caused by the neurotoxin of Clostridium tetani, a soil bacterium that enters through wounds. The toxin causes muscle spasms and rigidity. Diphtheria is by Corynebacterium diphtheriae, pertussis by Bordetella pertussis, botulism by Clostridium botulinum (also a neurotoxin, but from food poisoning). Vaccination with DPT/tetanus toxoid prevents tetanus.

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Question #1

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Consider the following statements about the skeletal system:
1. Bones store calcium and phosphorus.
2. Red bone marrow produces blood cells.
3. Ligaments connect muscle to bone.
Which of the above is/are correct?

A. 1 and 3 only

B. 1, 2, and 3

C. 2 and 3 only

D. 1 and 2 only

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Correct Answer: Option D

Explanation:
Bones store minerals (1) and contain marrow for hematopoiesis (2). Ligaments connect bone to bone; tendons connect muscle to bone. So 3 is incorrect.

This question belongs to: Science Biology

Question #2

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The disease caused by the fungus Candida albicans is:

A. Aspergillosis

B. Athlete's foot

C. Candidiasis

D. Ringworm

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Correct Answer: Option C

Explanation:
Candidiasis (thrush) is an opportunistic fungal infection caused by Candida albicans, affecting moist areas like mouth, vagina, and skin folds. Ringworm is caused by dermatophytes, athlete's foot by Trichophyton, aspergillosis by Aspergillus.

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Question #3

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The process of obtaining a large number of identical copies of a gene or organism is:

A. Hybridization

B. Cloning

C. Mutation

D. Transformation

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Correct Answer: Option B

Explanation:
Cloning produces genetically identical copies of a DNA fragment (molecular cloning) or an entire organism (reproductive cloning). Hybridization is crossing different varieties, mutation is change in DNA, transformation is DNA uptake.

This question belongs to: Science Biology

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