Who discovered the specific virus responsible for tobacco mosaic disease, launching the scientific discipline of Virology? MCQ with Answer and Explanation

Question

Who discovered the specific virus responsible for tobacco mosaic disease, launching the scientific discipline of Virology?

A. Robert Koch

B. Alexander Fleming

C. Dmitri Ivanovsky and Martinus Beijerinck

D. Louis Pasteur

Answer: Option C

Solution (By JKSSB Mock Tests)

Ivanovsky found that infected extracts remain contagious after chamber porcelain filtration; Beijerinck termed the fluid agent a 'virus'.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that biological enzymes can perform structural transformations outside of living cell containers, establishing cell-free fermentation?

A. Hans Krebs

B. Robert Koch

C. Louis Pasteur

D. Eduard Buchner

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Correct Answer: Option D

Explanation:
Buchner proved yeast extracts ferment sugar into ethanol without living cell structural scaffolding, winning the 1907 Nobel Prize in Chemistry.

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Question #2

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The fundamental laws of electric resistance ($V = IR$) were discovered by which physicist?

A. James Watt

B. André-Marie Ampère

C. Georg Simon Ohm

D. Alessandro Volta

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Correct Answer: Option C

Explanation:
Georg Simon Ohm discovered the direct proportionality between voltage and current across a conductor, known as Ohm's Law.

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Question #3

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The concept of 'Inertia' was first formulated by which scientist before being formalized into laws by Newton?

A. Nicolaus Copernicus

B. Galileo Galilei

C. Johannes Kepler

D. Aristotle

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Correct Answer: Option B

Explanation:
Galileo Galilei developed the early concept of inertia, which Isaac Newton later refined into his First Law of Motion.

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