MALARIA

Protozoa are unicellular eukaryotes and in most cases considerably larger than bacteria, but still of microscopic dimensions. The phylum protozoa comprises mainly four groups namely sarcodina, Mastigephora, ciliophora and sporozoa. The causative organism...

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MECHANISM OF DNA REPLICATION

A. Kornberg (1992) has nicely discussed the DNA replication. In E.coli DNA replication has been investigated most extensively. It is thought that in eukaryotes probably similar mechanism operates. However, it has been found that in E.coli replication...

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THE NUCELIC ACIDS : DNA AND RNA

The nucleic acids found in viruses and all living organisms (microorganisms, plants and animals) carry the genetic informations. A nucleic of three main constituents: (i) a cyclic five carbon sugar, (ii) a purine or pyrimidine base, and (iii) a phosphate....

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ORGNIZATION OF DNA IN EUKARYOTIC CELL

In addition to organization of DNA in prokaryotes , in eukaryotes the DNA helix is highly organized into the well defined DNA-protein complex termed as nucleosomes. Among the proteins the most prominent are the histones. The histones are small and basic...

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DIFFERENT FORMS OF DNA

The most common form of DNA which has right handed helix and proposed by Watson and Crick is called B-form of DNA or B-DNA. In addition, the DNA may be able to exist in other forms of double helical structure. These are A and C forms of double helix...

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Cell Membrane

The cell membrane is the bounding layer of cytoplasm of the cell. This is also called as plasma membrane or cytoplasmic membrane. The cell membrane is a vital structure and critical barrier that separates the inside of the cell from the outer environment....

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