Major Discoveries Related to Cell


 
 
Concept Explanation
 

Major Discoveries Related to Cell

Major Discoveries related to Cell

Scientist

Year

Work

Robert Hooke

1665

Discovered cells for first time in cork slice with the help of a primitive microscope.

Leeuwenhoek

1674

Discovered free living cells in pond water by his improved microscope.

Robert Brown

1831

Discovered nucleus in cell

Schleiden and Schwan

1838 - 1839

Presented cell theory, which states that all plants and animals are composed of cells and the cell is the basic unit of life. Schwan cell theory:

A. He reported that cells have a thin outer later which is today known as plasma membrane.

B. Cell wall as unique character of plant cell.

C. Body of plant and animals are composed of cells and product of cells.

Purkinje

1839

Coined the term 'protoplasm' for the fluid substance of cell

Virchow

1855

Expanded the cell theory by suggesting that all cells arise from pre existing cells`

Knoll and Ruska

1940

Built an electron microscope that made understanding of the complex structure of cell and its organelles possible.

Sample Questions
(More Questions for each concept available in Login)
Question : 1

Organelles were not clear evident in cells until the invention of the _______ microsope

Right Option : B
View Explanation
Explanation
Question : 2

The theory given by the scientist Schleiden and Schwann is called as  ______________________

Right Option : B
View Explanation
Explanation
Question : 3

Cells are first focused in microscope under ________________

Right Option : B
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Explanation
 
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