Who discovered that certain types of biological viruses infect and replicate exclusively inside bacterial cell hosts, establishing 'Bacteriophages'? MCQ with Answer and Explanation

Question

Who discovered that certain types of biological viruses infect and replicate exclusively inside bacterial cell hosts, establishing 'Bacteriophages'?

A. Dmitri Ivanovsky

B. Frederick Twort and Félix d'Hérelle

C. Louis Pasteur

D. Robert Koch

Answer: Option B

Solution (By JKSSB Mock Tests)

Twort and d'Hérelle independently isolated filterable bacterial lysis agents, establishing early phage therapeutic concepts.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that gases diffuse at specific rates relative to temperature variations, formalizing the Charles's Law?

A. John Dalton

B. Amadeo Avogadro

C. Robert Boyle

D. Jacques Charles and Joseph Louis Gay-Lussac

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Correct Answer: Option D

Explanation:
Jacques Charles collected gas expansion data in the 1780s, which Gay-Lussac later published as a direct linear volume-temperature relation.

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Question #2

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The invention of the common household safety glass used in car windows was an accidental discovery by whom?

A. Roy Plunkett

B. King Gillette

C. Édouard Bénédictus

D. Leo Baekeland

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Correct Answer: Option C

Explanation:
Bénédictus dropped a glass flask coated with a dried cellulose nitrate plastic film in 103, discovering that the shards held together.

This question belongs to: Static General Knowledge Inventions and Discoveries