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 [...]
The following points highlight the eight chief metabolically active cell organelles of cytoplasm. The organelles are: 1. Plastids 2. Mitochondria 3. Endoplasmic Reticulum 4. Golgi Bodies 5. Ribosomes 6. Centrosome 7. Lomasomes 8. Microtubules. Organelle # 1. Plastids: The term 'plastid' was firstly used by Haekel (1866). These are the largest bodies or largest cytoplasmic organelles of a plant cell. [...]