Edward Jenner is associated with the discovery of the vaccine for: MCQ with Answer and Explanation

Edward Jenner is associated with the discovery of the vaccine for:
A. Polio
B. Rabies
C. Tuberculosis
D. Smallpox
Answer: Option D
Solution (By JKSSB Mock Tests)
Edward Jenner, in 1796, observed that milkmaids who had cowpox were immune to smallpox. He used material from cowpox lesions to inoculate a boy, who later proved immune to smallpox. This was the first successful vaccine. Rabies vaccine was developed by Louis Pasteur, polio vaccine by Jonas Salk, TB vaccine (BCG) by Calmette and Guérin. Smallpox has been eradicated globally.

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Practice More Biology Questions

Question #1
Zoological parks and botanical gardens are examples of:
A. Biodiversity hotspots
B. Ex-situ conservation
C. In-situ conservation
D. Ecological succession

Correct Answer: Option B


Explanation:
Ex-situ (off-site) conservation involves protecting endangered species outside their natural habitats. Zoological parks, botanical gardens, seed banks, and cryopreservation facilities are examples of ex-situ conservation. This method allows for controlled breeding, research, and education, and can be a last resort for species whose natural habitats are severely degraded or destroyed.

This question belongs to: Science Biology
Question #2
Golden Rice is a genetically modified crop developed primarily to combat the deficiency of:
A. Vitamin C
B. Protein
C. Vitamin A
D. Iron

Correct Answer: Option C


Explanation:
Golden Rice is a transgenic variety of rice (Oryza sativa) engineered to produce beta-carotene, a precursor of Vitamin A, in the edible endosperm. The beta-carotene gives the rice grains a characteristic golden-yellow color. It was developed to address Vitamin A deficiency (VAD), a major public health issue in developing countries that causes blindness and increases susceptibility to infectious diseases in children.

This question belongs to: Science Biology
Question #3
The technique used to detect specific proteins in a tissue section using labeled antibodies is:
A. Flow cytometry
B. Western blotting
C. Immunohistochemistry
D. ELISA

Correct Answer: Option C


Explanation:
Immunohistochemistry (IHC) uses enzyme- or fluorophore-linked antibodies to visualize specific antigens in tissue sections. ELISA is for liquid samples, Western blot for membrane, flow cytometry for cells.

This question belongs to: Science Biology