The creation of the first highly precise marine chronometer ($H4$) that solved the global longitude tracking problem was done by whom? MCQ with Answer and Explanation
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Question #1
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Who discovered that electrical currents pass through vacuum cavities via discrete streams named 'Cathode Rays'?
Correct Answer: Option B
Explanation:
Plücker observed early glow phenomena, and Crookes engineered highly evacuated discharge tubes to isolate ray behaviors.
Plücker observed early glow phenomena, and Crookes engineered highly evacuated discharge tubes to isolate ray behaviors.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered that the genetic molecule DNA can transition between stable 'A' and 'B' structural forms depending on relative humidity levels?
Correct Answer: Option A
Explanation:
Franklin's meticulous control of humidity during X-ray diffraction isolation yielded the highly detailed 'B-form' structural patterns.
Franklin's meticulous control of humidity during X-ray diffraction isolation yielded the highly detailed 'B-form' structural patterns.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered that certain living tissue matrices lack internal cell partitions, establishing syncytial structures?
Correct Answer: Option D
Explanation:
Schwann expanded cell structural definitions across animal physiology, establishing shared base principles with plant tissues.
Schwann expanded cell structural definitions across animal physiology, establishing shared base principles with plant tissues.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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