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 [...]
In this article we will discuss about the structure of cells in all living organisms. In 1965, Robert Hooke observed a section of cork under microscope; he saw numerous chambers similar to those of beehive. He called the individual chambers as Cells. But he, in fact, observed only the walls of actual cells as he was viewing dead cells. Subsequently, [...]
The following points highlight the top three types of cell wall. The types are: 1. Prokaryotic Cell Wall 2. Plant Cell Wall 3. Animal Cell Glycocalyx. Type # 1. Prokaryotic Cell Wall: a. Capsule: Some bacteria contain a capsule that surrounds their cell wall, and protects them from phagocytosis. The capsule layer is loose, gel like structure and can be [...]