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:

Leela introduces two girls to her friend as the daughters of the only sister of her father. Leela and the girls are .........

 

A) cousins B) friends
C) nieces D) twins
 
Answer & Explanation Answer: A) cousins

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Q:

Which of the numbers given below is NOT rational?

 

A) 324 B) 643
C) 325 D) 273
 
Answer & Explanation Answer: A) 324

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Q:

Which of the numbers given below is NOT rational?

 

A) 324 B) 643
C) 325 D) 273
 
Answer & Explanation Answer: A) 324

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Q:

............. is an alkali metal.

 

A) Sodium B) Manganese
C) Aluminium D) Magnesium
 
Answer & Explanation Answer: A) Sodium

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Q:

Louis Pasteur was known for discovery of

A) Polio vaccine B) Chicken pox vaccine
C) Small pox vaccine D) Rabies vaccine
 
Answer & Explanation Answer: D) Rabies vaccine

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Q:

Who invented Telephone?

 

A) Alexander Graham Bell B) Thomas Edison
C) Benjamin Franklin D) James Watt
 
Answer & Explanation Answer: A) Alexander Graham Bell

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Q:

What was recently discovered hidden under ice in Antarctica?

A) A massive mountain range B) A lost Kingdom
C) A massive canyon system and lake D) A huge Dinosaur Skeleton
 
Answer & Explanation Answer: C) A massive canyon system and lake

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Q:

Telephone was invented in which decade?

 

A) 1670s B) 1770s
C) 1870s D) 1970s
 
Answer & Explanation Answer: C) 1870s

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