The following points highlight the five main components of the nucleus. The components are: 1. Nuclear envelope 2. Nuclear Sap or Nucleoplasm 3. Nucleolus 4. Chromatic Reticulum 5. Chromosomes. Nucleus: Component # 1. Nuclear Envelope: The nuclear membrane or karyotheca is the outer boundary of the nucleus. It is found in the nuclei of all the eukaryotic cells. Electron [...]
The following points highlight the six main components of the nucleus found in cells. The components are: 1. Nuclear Envelope 2. Nuclear Lamina 3. Nucleoplasm (Nuclear Sap) 4. Nucleolus 5. Chromatin Fibres 6. Nuclear Matrix. Component # 1. Nuclear Envelope: The nuclear envelope is made up of two concentric membranes, each of 7-8 nm thickness. The space between the two [...]
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 [...]