In this article we will discuss about:- 1. Meaning of Plasma Membrane 2. Structure of Plasma Membrane 3. Functions. Meaning of Plasma Membrane: The membrane enclosing a cell is called cell membrane or plasma membrane (animal cells) and plasma lemma (plant cells). It contains proteins and lipids in the ratio of 80 : 20 in bacteria on one extreme and [...]
In this article we will discuss about the Plasma Membrane:- 1. Subject Matter of the Plasma Membrane 2. Chemical Composition of Plasma Membrane 3. Specialized Structure 4. Functions. Subject Matter of the Plasma Membrane: The protoplasm of the cell is bounded by an exceedingly thin elastic, semi-permeable living limiting membrane called the plasmalemma or plasma membrane or cytoplasmic membrane or [...]
The following points highlight the top three theories of plasma membrane. The theories are: 1. Lamellar Theory 2. Unit Membrane Theory 3. Micellar Theory. 1. Lamellar Theory: "Sandwitch model" proposed by Danielli and Davson (1935), the plasma membrane exhibit trilaminar structure i.e., a lipid layer is bounded by protein layer on both the sides. In this model, proteins are usually [...]