Q1. Who discovered penicillin, the first antibiotic?
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Answer: B. Alexander Fleming
Alexander Fleming discovered penicillin in 1928 from the mould Penicillium.
Biology - Diseases Questions for SSC CGL (with Answers)
9 Biology - Diseases MCQs from the General Awareness section, with answers and short explanations.
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Q2. Tuberculosis is caused by a:
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Answer: A. Bacterium
Tuberculosis is a bacterial disease caused by Mycobacterium tuberculosis.
Q3. Rabies is usually transmitted to humans through:
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Answer: D. The bite of an infected animal such as a dog
Rabies virus spreads through the saliva of an infected animal, usually by a dog bite.
Q4. Malaria is transmitted by the bite of the:
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Answer: D. Female Anopheles mosquito
The female Anopheles mosquito carries Plasmodium and spreads malaria.
Q5. Malaria is caused by which protozoan?
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Answer: B. Plasmodium
Malaria is caused by the protozoan Plasmodium, which infects liver and red blood cells.
Q6. Dengue fever is spread by which mosquito?
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Answer: A. Aedes
Dengue virus is transmitted by Aedes mosquitoes, especially Aedes aegypti.
Q7. Which of the following is a viral disease?
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Answer: B. Measles
Measles is caused by a virus; typhoid, cholera and tuberculosis are bacterial diseases.
Q8. Who developed the first vaccine, against smallpox?
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Answer: A. Edward Jenner
Edward Jenner developed the smallpox vaccine in 1796 using cowpox.
Q9. Typhoid is caused by the bacterium:
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Answer: C. Salmonella typhi
Typhoid fever is caused by Salmonella typhi.
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