Who discovered the phenomenon of specific biological chemical pathways known as carbon fixation or the dark reactions of photosynthesis? MCQ with Answer and Explanation

Who discovered the phenomenon of specific biological chemical pathways known as carbon fixation or the dark reactions of photosynthesis?
A. Melvin Calvin
B. Hans Krebs
C. Louis Pasteur
D. Robert Emerson
Answer: Option A
Solution (By JKExamLibrary)
Melvin Calvin traced the pathway of carbon absorption in plants using carbon-14, establishing the Calvin-Benson Cycle.

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Practice More Inventions and Discoveries Questions

Question #1 Report Error
Who invented the first practical electronic pocket calculator, introduced commercially in 1970?
A. Alan Turing
B. Douglas Engelbart
C. Sanyo and Texas Instruments teams
D. Charles Babbage

Correct Answer: Option C


Explanation:
Sanyo's ICC-0081 and Texas Instruments' 'Cal-Tech' project initiated the mass scaling of hand-held microelectronic computation.

Question #2 Report Error
Who discovered that biological chemical energy transfers are regulated by specific high-energy nucleotide molecules called ATP?
A. Hans Krebs
B. Eduard Buchner
C. Karl Lohmann
D. Fritz Lipmann

Correct Answer: Option C


Explanation:
Karl Lohmann isolated Adenosine Triphosphate from muscle tissues in 1929, identifying it as the universal intracellular energy currency.

Question #3 Report Error
The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698?
A. Richard Trevithick
B. Thomas Savery
C. James Watt
D. Thomas Newcomen

Correct Answer: Option B


Explanation:
Thomas Savery patented the first commercial steam-driven machine to pump water out of flooded mines.