Who discovered that certain types of mold produce enzymes that slice viral genetic strains, known as CRISPR-Cas9 genome editing? MCQ with Answer and Explanation

Question
Who discovered that certain types of mold produce enzymes that slice viral genetic strains, known as CRISPR-Cas9 genome editing?
A. Alec Jeffreys
B. Kary Mullis
C. James Watson
D. Emmanuelle Charpentier and Jennifer Doudna
Answer: Option D
Solution (By JKSSB Mock Tests)
Charpentier and Doudna adapted the bacterial immune mechanism into an exceptionally precise genetic engineering tool, winning the 2020 Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered the citric acid cycle (also known as the Krebs cycle) in cellular respiration?
A. Arthur Kornberg
B. Hans Adolf Krebs
C. Melvin Calvin
D. Louis Pasteur
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Correct Answer: Option B

Explanation:
Hans Adolf Krebs discovered the metabolic pathway of energy conversion in cells in 1937, winning the Nobel Prize in 1953.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that atomic electronic distributions can be mapped inside multi-dimensional coordinate grids, formulating Matrix Mechanics?
A. Wolfgang Pauli
B. Niels Bohr
C. Werner Heisenberg, Max Born, and Pascual Jordan
D. Erwin Schrödinger
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Correct Answer: Option C

Explanation:
Heisenberg formulated matrix quantum mechanics in 1925, which Born and Jordan mathematically structured into matrix arrays.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The electron was discovered in 1897 by which of the following physicists?
A. Ernest Rutherford
B. James Chadwick
C. J.J. Thomson
D. John Dalton
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Correct Answer: Option C

Explanation:
J.J. Thomson discovered the electron through his experiments with cathode ray tubes in 1897.
This question belongs to: Static General Knowledge Inventions and Discoveries
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