Alexander Fleming discovered penicillin, the world's first effective antibiotic, in which year? MCQ with Answer and Explanation

Question
Alexander Fleming discovered penicillin, the world's first effective antibiotic, in which year?
A. 1918
B. 1928
C. 1935
D. 1942
Answer: Option B
Solution (By JKSSB Mock Tests)
Sir Alexander Fleming discovered penicillin in 1928 at St. Mary's Hospital, London, after noticing a mold contaminating a petridish of staphylococci.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the highly stable high-speed ship hull configuration known as the Hydrofoil was patented by whom?
A. Charles Parsons
B. Robert Fulton
C. John Ericsson
D. Enrico Forlanini and Alexander Graham Bell
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Correct Answer: Option D

Explanation:
Forlanini and Bell developed wings that lifted boat hulls out of the water to eliminate surface drag friction.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the mass spectrometer, used to separate isotopes and determine chemical composition, was developed by whom?
A. J.J. Thomson
B. James Chadwick
C. Francis William Aston
D. Ernest Rutherford
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Correct Answer: Option C

Explanation:
Francis William Aston built the first fully functional mass spectrograph in 1919 and discovered isotopes in non-radioactive elements.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered that biological chromosomes carry the unique hereditary factor tracking layouts, establishing Chromosome Theory?
A. James Watson
B. Gregor Mendel
C. Walter Sutton and Theodor Boveri
D. Thomas Hunt Morgan
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Correct Answer: Option C

Explanation:
Sutton and Boveri independently identified in 1902 that chromosome pairing and separation match Mendelian inheritance laws.
This question belongs to: Static General Knowledge Inventions and Discoveries
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