The below mentioned article provides notes on elements of cytoskeleton. Cytoskeleton is shown to be present in both pro- and eukaryotic cells and are responsible for the stability of cell shape and different movements within and among the cells. Plasma membrane is associated with a cytoskeleton called 'membrane skeleton' and hence regulates several functions of the membrane. Basically cytoskeleton comprises [...]
The synthesis of proteins is directed by DNA or genetic RNA, where DNA is absent. The basic information for the polypeptide structure is stored in the polynucleotide chain. The base sequence in the codon determines the amino acids sequence in a particular polynucleotide. In general, there are three views regarding the flow of genetic information and these are one-way, circular [...]
In this article we will discuss about the maturation of mRNA from HnRNA. In higher organisms, within the nucleus, heterogenous nuclear RNA (HnRNA) or high molecular weight RNA (HMW RNA) or DNA-like-RNA (dRNA) is synthesized. These molecules are larger than mRNA and used in cytoplasm. Polymerase-I is added at 3'-end of HnRNA. Subsequently mRNA molecule is released when HnRNA having [...]