Who discovered that certain types of biological fungal spores prevent bacterial cell wall cross-linking, identifying Penicillin's mechanism? MCQ with Answer and Explanation

Question
Who discovered that certain types of biological fungal spores prevent bacterial cell wall cross-linking, identifying Penicillin's mechanism?
A. Robert Koch
B. Howard Florey and Ernst Chain
C. Alexander Fleming
D. Louis Pasteur
Answer: Option B
Solution (By JKSSB Mock Tests)
While Fleming discovered penicillin, Florey and Chain isolated and purified the molecule for medical treatment, sharing the 1945 Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common electronic operating layout known as the Graphical User Interface (GUI) was pioneered by which lab?
A. Microsoft
B. Xerox PARC
C. IBM Research
D. Apple Computers
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Correct Answer: Option B

Explanation:
Xerox Palo Alto Research Center (PARC) engineered the Alto computer featuring mouse-driven windows, menus, and file icons.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered the exact relationship between mechanical work done and heat generated, leading to the SI unit of energy?
A. James Watt
B. James Prescott Joule
C. Rudolf Clausius
D. Lord Kelvin
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Correct Answer: Option B

Explanation:
James Prescott Joule established the mechanical equivalent of heat through rigorous thermodynamic experiments.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered the true nature of combustion as an oxidation process, disproving the phlogiston theory?
A. Robert Boyle
B. Antoine Lavoisier
C. John Dalton
D. Joseph Priestley
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Correct Answer: Option B

Explanation:
Antoine Lavoisier demonstrated that combustion involves elements chemically combining with oxygen.
This question belongs to: Static General Knowledge Inventions and Discoveries
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