Who discovered that yellow fever is transmitted by a specific mosquito species rather than direct human contact? MCQ with Answer and Explanation

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Who discovered that yellow fever is transmitted by a specific mosquito species rather than direct human contact?

A. Walter Reed

B. Ronald Ross

C. Carlos Finlay

D. Louis Pasteur

Answer: Option A

Solution (By JKSSB Mock Tests)

Major Walter Reed led the commission that experimentally proved Carlos Finlay's theory that yellow fever is transmitted by the Aedes aegypti mosquito.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie?

A. J.J. Thomson

B. Henri Becquerel

C. Wilhelm Röntgen

D. Ernest Rutherford

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Correct Answer: Option B

Explanation:
Becquerel left uranium compounds in a dark desk drawer with unexposed photographic plates, discovering they fogged without light exposure.

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Question #2

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The invention of the first functional program-controlled electronic binary computing architecture, the EDSAC, was completed where?

A. University of Cambridge by Maurice Wilkes

B. Stanford Research Institute

C. Harvard University

D. University of Pennsylvania

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Correct Answer: Option A

Explanation:
The EDSAC (Electronic Delay Storage Automatic Calculator) performed its first calculation in 1949, applying von Neumann's stored-program architecture.

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Question #3

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The invention of the first functional synthetic dye, Mauveine, was an accidental discovery by which young chemist?

A. August Wilhelm von Hofmann

B. William Henry Perkin

C. Fritz Haber

D. Antoine Lavoisier

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Correct Answer: Option B

Explanation:
Perkin accidentally synthesized aniline purple dye in 1856 while attempting to manufacture artificial anti-malarial quinine out of coal tar.

This question belongs to: Static General Knowledge Inventions and Discoveries

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