The invention of the common mechanical cash layout system tracking mechanism was expanded by which major corporation? MCQ with Answer and Explanation

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The invention of the common mechanical cash layout system tracking mechanism was expanded by which major corporation?

A. Microsoft

B. Xerox

C. IBM

D. NCR (National Cash Register) under John H. Patterson

Answer: Option D

Solution (By JKSSB Mock Tests)

NCR purchased Ritty's early patents and scaled mechanical register verification across retail networks globally.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the precise genetic structure layout known as the operon model in bacterial gene regulation?

A. James Watson and Francis Crick

B. François Jacob and Jacques Monod

C. Barbara McClintock

D. Gregor Mendel

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Correct Answer: Option B

Explanation:
Jacob and Monod mapped the lac operon in E. coli, proving how cells inhibit or promote enzyme production based on nutrient environments.

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Question #2

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The expanding nature of the universe was discovered by which astronomer?

A. Galileo Galilei

B. Albert Einstein

C. Johannes Kepler

D. Edwin Hubble

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Correct Answer: Option D

Explanation:
Edwin Hubble discovered in 1929 that galaxies are moving away from each other, indicating that the universe is expanding.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who discovered that light waves travel as transverse vibrations, contradicting the longitudinal wave model?

A. Isaac Newton

B. Christiaan Huygens

C. Augustin-Jean Fresnel and Thomas Young

D. James Clerk Maxwell

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Correct Answer: Option C

Explanation:
Fresnel and Young demonstrated through polarization experiments that light waves propagate perpendicular to the direction of travel.

This question belongs to: Static General Knowledge Inventions and Discoveries

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