Where Is Dna Found In Bacteria

Where Is DNA Found In Bacteria ?

Bacteria are unicellular microorganisms that are so small as to be observable only under a microscope. A magnification of a minimum of 500 times is necessary to make most visible.

But some require as much as 1000 times. The size varies from one to two millionths of a meter. Bacteria have no fixed shape or size and are prevalent all over.  They thrive in the number of different environments, have varying nutritional needs and perform a range of functions.

Most bacteria fall within three classifications of shape, namely rods, spherical or spiral.  A further classification is whether or not bacteria require oxygen to survive. Those that require oxygen are called aerobic bacteria while those unable to survive in an oxygen rich environment are known as anaerobic bacteria. Another method of classification goes according to the differences in composition of the cell wall. A technique called Gram’s stain recognizes bacteria either as gram-positive or alternatively, gram-negative. Those with a thicker cell wall are gram positive. Knowledge of whether the harmful bacteria are gram positive or instead gram negative, assists the physician in prescribing the proper antibiotic.

The cell wall of bacteria is especially tough and often resists the body's natural immune fighting mechanism. The vast majority of bacteria house a solitary coil of DNA while others have multiple pieces. Sometimes bacterial cells have additional pieces of DNA which are known as plasmids. It makes no difference to the cell whether these plasmids are gained or lost. A watery fluid called Cytoplasm, packed with nutrients surrounds the DNA in the bacterial cell. Within the cell wall, a membrane binds together the DNA with the other constituents of the cytoplasm.

More Articles :

Where Is Dna Found In Bacteria