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:- 1. Ultrastructure of Mitochondria 2. Function of Mitochondria 3. Reproduction. Ultrastructure of Mitochondria: In 1953, Palade and Sjostrand independently described the ultrastructure of mitochondria. Mitochondria are bounded by an envelope consisting of two concentric membranes, the outer and inner membranes. The space between the two membranes is called inter-membrane space. A number of [...]
The following points highlight the three main classes of protein fibers in cytoskeleton. The classes are: 1. Microtubules 2. Actin Filaments 3. Intermediate Filaments. Protein Fibers in Cytoskeleton: Class # 1. Microtubules: Microtubules are long thread-like structures measuring about 25 nm in diameter; their length varies up to several millimeters. Microtubules have the following two main properties: (i) Long and [...]