In this article we will discuss about the cell wall and its structure. In plants a cell is always bounded by a wall known as cell wall. It is primarily composed of cellulose. There are also hemicellulose, pectin, lignin, cutin and mineral deposits involved in building up of the cell wall at different stages of development. The cell wall of [...]
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. [...]