In this article we will discuss about:- 1. Introduction to the Cell Cycle 2. Regulation of Cell Cycle 3. Division of the Nucleus of a Cell 4. Errors in Cell Division. Introduction to the Cell Cycle: The higher plants and animals begin their life as a single cell called ovum which is fertilized by a male cell resulting into formation [...]
Two types of vectors are used for the introduction of foreign genes into plant cells. Among them, the Ti-plasmid of Agrobacterium tumefaciens and a few plant viruses such as caulimoviruses and geminiviruses are the most important ones. Vector # 1. Agrobacterium Tumefaciens Ti Plasmids: Plants cells do not contain natural plasmids that can be utilised as cloning vectors. However, the [...]
The following points highlight the top four historical models of Plasma Membrane. The models are: 1. Lipid and Lipid Bilayer Models 2. Unit Membrane Model (Protein-Lipid Bilayer-Protein) 3. Fluid Mosaic Model 4. Dannelli Model. 1. Lipid and Lipid Bilayer Model: This model to explain the structure of plasma membrane was given by Overton, Gorion and Grendel. Previously only indirect information [...]