Discovery of Cell


 
 
Concept Explanation
 

Discovery of Cell

Discovery of Cell: Robert Hooke (1665) while examining a thin slice of cork under the primitive microscope, observed that cork consists of small box like structure resembling honeycomb. He called these boxes 'cells'. The substance called cork comes from the bark of a tree. The use of word "Cell" to describe these units is used till today in biology. Cell is a Latin word for 'a little room'. Basic characteristics of cells are as follows:

  • They have the ability to replicate independently
  • They contain hereditary information
  • They can perform all the life sustaining activities in their own
  • They show similar chemical composition and metabolic activities
  • In 1939, Schleiden and Schwann formulated Cell Theory. According to Cell Theory:

  • All living things are composed of one or more cells
  • Cells are the basic structural and functional unit in living things
  • All cells arise from pre - existing cells by cell division
  • Cells have similar structure and metabolism 
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    The term protoplasm is coined by ____________________ .

    Right Option : D
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    Explanation
    Question : 2

    Living cells were discovered by _______________.

    Right Option : C
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    Explanation
    Question : 3

    The term protoplasm has been coined by ____________________ .

    Right Option : D
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    Explanation
     
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