In this article we will discuss about the meaning of transposable elements. The chromosomes of E. coli and other prokaryotes contain discrete moveable segments of DNA called transposable elements, which can be translocated to other locations. Such DNA sequences can move from one position on a chromosome to another, and from one DNA molecule to another. They are detected when [...]
The following points highlight the three main types of cytoskeletal structures of eukaryotic cell. The types are: 1. Microfilaments 2. Intermediate Filaments 3. Microtubules. Cytoskeletal Structure of Eukaryotic Cell: Type # 1. Microfilaments: They are ultramicroscopic long, narrow cylindrical rods or protein filaments which occur in eukaryotic plant and animal cells. Microfilaments are made up of actin (also present in [...]
The following points highlight the nineteen important functions of cell membranes. 1. The cell membranes cause compartmentalization. As plasma membranes they separate the cells from their external environment. As organelle coverings, they allow the cell organelles to maintain their identity, internal environment and functional individuality. 2. Plasma membrane protects the cell from injury. 3. The membranes allow the flow of [...]