In this article we will discuss about:- 1. Meaning of Plasma Membrane 2. Chemical Composition of Plasma Membrane 3. Origin 4. Functions. Meaning of Plasma Membrane: The term 'Plasma membrane' was given by Pfeffer. It is situated just inside the cell wall and is also termed as cell membrane, plasma lemma or cytomembrane. The term 'Plasma lemma' was given by [...]
In this article we will discuss about the structure and functions of nucleolus. Structure of Nucleolus: Estable and Sotelo (1951) described the structure of a nucleolus under the light microscope. According to them, nucleolus consists of a continuous coiled filament called the nucleolonema embedded in a homogenous matrix, the pars amorpha. The first description of nucleolar ultra structure was given [...]
In this article we will discuss about the types and parts of nucleus in plants. Types of Nucleus: 1. Uninucleate cell: It is also referred to as monokaryotic cell, mostly plant cell which contain single nucleus. 2. Bi-nucleate cell: It is also called as dikaryotic cell, which contains 2 nucleus at a time. Example is (i) Paramecium (mega and micronucleus) [...]