Cell Theory was given by

Question

Question

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Answer 1

Correct Answer: Schleiden and Schwann

Rationale:

Cell theory is a fundamental principle in biology that explains the properties and functions of cells, the basic unit of life.
Matthias Schleiden, a German botanist, and Theodor Schwann, a German physiologist, are credited with formulating the cell theory in 1839. Their work established that all living organisms are composed of cells and that the cell is the basic unit of life.
The key points of the cell theory are:
- All living organisms are made up of one or more cells.
- The cell is the basic structural and functional unit of life.
- All cells arise from pre-existing cells through cell division.

Explanation of Other Options:

Singer and Nicolson

Rationale: Singer and Nicolson are known for proposing the fluid mosaic model of the cell membrane in 1972. This model describes the cell membrane as a flexible layer made up of lipid molecules with large protein molecules that act as channels through which other molecules enter and leave the cell.

Rudolf Virchow

Rationale: Rudolf Virchow, a German physician, contributed to the cell theory by adding the concept of "Omnis cellula e cellula," which means "All cells come from pre-existing cells." His work emphasized that diseases are caused by changes at the cellular level.

Robertson

Rationale: Robertson is known for his work on the unit membrane model, which proposed that the cell membrane is a bilayer of lipids with proteins on the surface. However, he did not contribute to the formulation of the cell theory.

Conclusion:

Among the given options, Schleiden and Schwann are correctly credited with the formulation of the cell theory, which is a cornerstone of modern biology. Their contributions laid the foundation for our understanding of the structure and function of cells in all living organisms.