Quick Notes on Endoplasmic Reticulum! Structure of Endoplasmic Reticulum in Cell: Structurally the endoplasmic reticulum (ER) consists of cisternae, tubules and vesicles (Fig. 2.42). The cisternae are broad, flat, membrane-bound spaces arranged parallel to each other to form lamellae, which are connected with each other. The tubules are 50-1OOA in diameter. The vesicles or sacs are membrane- bound, isolated globose [...]
Quick Notes on Mitochondria:- 1. Introduction to Mitochondria in Cell 2. Origin of Mitochondria in Cell 3. Structure 4. Function. Introduction to Mitochondria in Cell: Mitochondria are membrane bound cell organelles, associated with cellular respiration, the source of energy, being termed as power houses of cell. Mitochondria, discovered by Benda (1898), are present in eukaryotic cells. These are bean-shaped organelles, [...]
The following points highlight the two main types of organellar DNA in cell. The types are: 1. Chloroplast DNA (cp DNA) 2. Mitochondrial DNA (mt DNA). Organellar DNA: Type # 1. Chloroplast DNA (cp DNA): Each chloroplast contains 20-200 copies of a circular double stranded DNA molecule, which may also be linear as found in maize, cp DNA is characterized [...]