Question:

Who gave the lamellar or sandwich model of cell membrane?

Updated On: Jul 7, 2022
  • Singer and Nicolson
  • Danielli and Davson
  • J. Robertson
  • None of these
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The Correct Option is B

Solution and Explanation

In $1935$, Danielli and Davson proposed that cell membrane is made of a double layer of phospholipid molecules sandwiched between two single layers of proteins. The three layers are held together by electrostatic forces while phospholipid layers are kept adhered by vander Waal's forces
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Notes on Cell: the unit of life

Concepts Used:

Cell: The Unit of Life

  • A cell is derived as the functional and structural unit of life. Every cell is surrounded by a cell membrane that dissects the external and internal environments of the cell. The interior environment of a cell is called the cytoplasm.
  • It carries cellular machinery and structural elements. The nucleus is present in the center of the cell, which includes all the hereditary information of an organism. Some of the molecules present in the cell are protein, carbohydrates, starch, and sugar.

Read More: Fundamental Unit of Life: Cell

Parts of Cell:

The different parts of a cell and their functions are as follows:

  • Cell Membrane
  • Cell Wall
  • Nucleus
  • Cytoplasm