Who discovered the bacterium Vibrio cholerae, the causative agent of cholera? MCQ with Answer and Explanation

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Who discovered the bacterium Vibrio cholerae, the causative agent of cholera?

A. Robert Koch

B. Alexander Fleming

C. Louis Pasteur

D. Joseph Lister

Answer: Option A

Solution (By JKSSB Mock Tests)

Robert Koch isolated Vibrio cholerae in 1883 during an epidemic outbreak investigation in Egypt and India.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common household device known as the electric food blender was developed by whom?

A. Thomas Edison

B. Stephen Poplawski

C. Alva Fisher

D. George Schneider

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Correct Answer: Option B

Explanation:
Poplawski patented the bottom-motor container cutting blender mechanism in 1922 to prepare fountain soda drinks.

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Question #2

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The invention of the flash memory architecture, ubiquitous in USB drives and SSDs, was developed by whom?

A. Alan Turing

B. Douglas Engelbart

C. Tim Berners-Lee

D. Fujio Masuoka

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Correct Answer: Option D

Explanation:
Fujio Masuoka invented both NOR and NAND flash memory while working at Toshiba in the 1980s.

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Question #3

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The X-ray was discovered in 1895 by which Nobel laureate?

A. Niels Bohr

B. Wilhelm Röntgen

C. Albert Einstein

D. Max Planck

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Correct Answer: Option B

Explanation:
Wilhelm Röntgen discovered X-rays in 1895 and received the first-ever Nobel Prize in Physics in 1901.

This question belongs to: Static General Knowledge Inventions and Discoveries

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