Who discovered the first known antibiotic substance produced by soil actinomycetes, Actinomycin? MCQ with Answer and Explanation

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Who discovered the first known antibiotic substance produced by soil actinomycetes, Actinomycin?

A. Selman Waksman

B. Alexander Fleming

C. Louis Pasteur

D. Robert Koch

Answer: Option A

Solution (By JKSSB Mock Tests)

Selman Waksman and his student H. Boyd Woodruff isolated actinomycin in 1940, sparking targeted soil microbe screening programs.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the modern mechanical reaper, which automated grain harvesting, was patented by whom?

A. James Hargreaves

B. John Deere

C. Eli Whitney

D. Cyrus McCormick

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Correct Answer: Option D

Explanation:
Cyrus McCormick patented the horse-drawn mechanical reaper in 1834, transforming agricultural output.

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Question #2

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The invention of the diesel engine is named after which German mechanical engineer?

A. Nikolaus Otto

B. Karl Benz

C. Rudolf Diesel

D. Gottlieb Daimler

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Correct Answer: Option C

Explanation:
Rudolf Diesel designed a high-efficiency compression-ignition internal combustion engine, patented in 1893.

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Question #3

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The invention of the common computing operating system layout known as Unix was co-developed by whom?

A. Ken Thompson and Dennis Ritchie

B. Bill Gates

C. Steve Jobs

D. Linus Torvalds

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Correct Answer: Option A

Explanation:
Thompson and Ritchie engineered Unix at Bell Labs in 1969, establishing foundational standards for multitasking operating systems.

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