In this article we will discuss about:- 1. Discovery of Endoplasmic Reticulum 2. Types of Endoplasmic Reticulum 3. Structure 4. Functions. Discovery of Endoplasmic Reticulum (ER): It was discovered independently by Porter (1945) and Thompson (1945). The name was given by Porter in 1953. Endoplasmic reticulum is a 3-dimensional, complicated and interconnected syncrri of membrane-lined channels that run through the [...]
The following points highlight the eighteen important characteristics of prokaryotic cells. Characteristic # 1. Nuclear Material: DNA is naked and lies variously coiled in the cytoplasm. It is often called gonophore, nuclear body or nucleoid. It is equivalent to a single naked chromosome and is, therefore, also called prochromosome. Many prokaryotes also have additional small circular DNA entities called plasmids. [...]
In this article we will discuss about the Structure and Functions of Centrioles. Structure of Centrioles: Centrioles are minute-sub-microscopic micro tubular sub cylinders with a configuration of nine triplet fibrils and ability to form their own duplicates, astral poles and basal bodies, without having DNA and a membranous covering. They are approximately 0.3-0.5 µm in length and 0.15µm in diameter. [...]