11
Q:

Who Discovered The Nucleus of a Cell?

A) Otto Hahn B) John Dalton
C) Robert Brown D) Marie Curie

Answer:   C) Robert Brown



Explanation:

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

Subject: Inventions
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Q:

Who discovered Insulin?

A) Sir Alexander Fleming B) Frederick Banting
C) James Watt D) Sir F.G. Hopkins
 
Answer & Explanation Answer: B) Frederick Banting

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Q:

Who invented the hot air balloon?

A) Montgolfier brothers B) Wright brothers
C) Lisitsyn brothers D) Walton brothers
 
Answer & Explanation Answer: A) Montgolfier brothers

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Q:

Who invented the thermos flask?

A) Ray Tomlinson B) Tim Berners-Lee
C) William Cullen D) James Dewar
 
Answer & Explanation Answer: D) James Dewar

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Q:

Who invented radar?

A) Fred Morrison B) A. H. Taylor and Leo C. Young
C) Van Tassel D) W. K. Roentgen
 
Answer & Explanation Answer: B) A. H. Taylor and Leo C. Young

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Q:

Who discovered electron?

A) E. Goldstien B) J. J. Thomson
C) Ernest Rutherford D) J. Chadwick
 
Answer & Explanation Answer: B) J. J. Thomson

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Q:

Edward Jenner discovered vaccine for which of the following disease?

A) Polio B) Tuberculosis
C) Small Pox D) Rabies
 
Answer & Explanation Answer: C) Small Pox

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Q:

Who developed the theory of relativity?

A) Issac Newton B) Charles Darwin
C) Marie Curie D) Albert Einstein
 
Answer & Explanation Answer: D) Albert Einstein

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Q:

Who invented the Centigrade scale?

A) Anders Celsius B) Daniel Gabriel Fahrenheit
C) William Thomson D) Wright Brothers
 
Answer & Explanation Answer: A) Anders Celsius

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