Who discovered that certain types of biological bacteria live completely without oxygen coordinates, establishing anaerobic pathways? MCQ with Answer and Explanation

Question

Who discovered that certain types of biological bacteria live completely without oxygen coordinates, establishing anaerobic pathways?

A. Robert Koch

B. Edward Jenner

C. Louis Pasteur

D. Alexander Fleming

Answer: Option C

Solution (By JKSSB Mock Tests)

Pasteur discovered butyric acid fermentation bacteria in 1861, proving that life can persist without atmospheric oxygen.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the velocity of sound in a gas depends directly on the ratio of specific heats?

A. Christiaan Huygens

B. Pierre-Simon Laplace

C. Isaac Newton

D. Robert Boyle

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Correct Answer: Option B

Explanation:
Laplace corrected Newton's isothermal calculation of sound speed by incorporating adiabatic heating/cooling factors.

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Question #2

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The invention of the first functional synthetic dye, Mauveine, was an accidental discovery by which young chemist?

A. August Wilhelm von Hofmann

B. William Henry Perkin

C. Antoine Lavoisier

D. Fritz Haber

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Correct Answer: Option B

Explanation:
Perkin accidentally synthesized aniline purple dye in 1856 while attempting to manufacture artificial anti-malarial quinine out of coal tar.

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Question #3

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Who discovered the exact structural formula of the complex molecule Vitamin B12, using advanced X-ray crystallography?

A. Dorothy Hodgkin

B. Rosalind Franklin

C. Marie Curie

D. Barbara McClintock

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Correct Answer: Option A

Explanation:
Dorothy Hodgkin determined the atomic structures of penicillin, vitamin B12, and insulin, winning the 1964 Nobel Prize in Chemistry.

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