The invention of the mechanical printing press was dramatically optimized by Gutenberg using an alloy of which metals? MCQ with Answer and Explanation
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Question #1
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Who discovered the primary biological pattern detailing that DNA nucleotide bases match in specific pairs ($A=T, G=C$)?
Correct Answer: Option C
Explanation:
Chargaff's Rules established the 1:1 stoichiometric ratios of purines to pyrimidines, providing a key clue for Watson and Crick's model.
Chargaff's Rules established the 1:1 stoichiometric ratios of purines to pyrimidines, providing a key clue for Watson and Crick's model.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered the chemical element Chlorine in 1774?
Correct Answer: Option C
Explanation:
Swedish-German chemist Carl Wilhelm Scheele isolated chlorine gas, mistakenly thinking it contained oxygen. Humphry Davy later identified it as an element.
Swedish-German chemist Carl Wilhelm Scheele isolated chlorine gas, mistakenly thinking it contained oxygen. Humphry Davy later identified it as an element.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The fundamental laws of electric resistance ($V = IR$) were discovered by which physicist?
Correct Answer: Option D
Explanation:
Georg Simon Ohm discovered the direct proportionality between voltage and current across a conductor, known as Ohm's Law.
Georg Simon Ohm discovered the direct proportionality between voltage and current across a conductor, known as Ohm's Law.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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