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 invented the Band-aid?

A) Earle Dickson B) Alan Gant
C) Louis Pasteur D) Frank Epperson
 
Answer & Explanation Answer: A) Earle Dickson

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Q:

Who invented the mobile phone?

A) Joseph Wilson B) Edwin Land
C) Martin Cooper D) John Lloyd Wright
 
Answer & Explanation Answer: C) Martin Cooper

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Q:

Who invented the bifocal glasses?

A) Thomas Alva Edison B) Benjamin franklin
C) Evangelista D) Isaac Newton
 
Answer & Explanation Answer: B) Benjamin franklin

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Q:

Physical Research Laboratory was founded by ____.

A) S.K. Mitra B) C.V. Raman
C) Homi Bhaba D) Vikram Sarabhai
 
Answer & Explanation Answer: D) Vikram Sarabhai

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Q:

The first gasoline-run car engine was developed by

 

A) Henry Ford B) Carl Benz
C) Hugh Chalmers D) Horace Elgin Dodge
 
Answer & Explanation Answer: B) Carl Benz

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Q:

X-Rays, which are now used on a day to day basis for diagnosis in medicine, was discovered by?

A) Wilhelm Rontgen B) Niels Bohr
C) Ernest Rutherford D) Max Bon
 
Answer & Explanation Answer: A) Wilhelm Rontgen

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Q:

Which dynasty had its capital at Chittorgarh?

A) Chauhan B) Sisodia
C) Hada D) Rathor
 
Answer & Explanation Answer: B) Sisodia

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Q:

Who discovered radioactivity?

A) Max Planck B) James Clerk Maxwell
C) Henri Becquerel D) Heinrich Hertz
 
Answer & Explanation Answer: C) Henri Becquerel

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