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

Question
Who discovered the bacterium Vibrio cholerae, the causative agent of cholera?
A. Louis Pasteur
B. Joseph Lister
C. Alexander Fleming
D. Robert Koch
Answer: Option D
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
Alexander Fleming discovered penicillin, the world's first effective antibiotic, in which year?
A. 1942
B. 1935
C. 1928
D. 1918
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Correct Answer: Option C

Explanation:
Sir Alexander Fleming discovered penicillin in 1928 at St. Mary's Hospital, London, after noticing a mold contaminating a petridish of staphylococci.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who invented the electrocardiogram (ECG/EKG) device, winning a Nobel Prize in 1924?
A. Robert Koch
B. Hans Berger
C. Willem Einthoven
D. Alexander Fleming
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Correct Answer: Option C

Explanation:
Willem Einthoven invented the first practical electrocardiogram in 1903 and received the Nobel Prize for it.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who invented the first mechanical computer, known as the 'Difference Engine'?
A. Alan Turing
B. Charles Babbage
C. John von Neumann
D. Blaise Pascal
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Correct Answer: Option B

Explanation:
Charles Babbage designed the Difference Engine and the Analytical Engine, earning him the title 'Father of the Computer'.
This question belongs to: Static General Knowledge Inventions and Discoveries
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