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Define Ziehl-Neelsen Staining Technique?
Ziehl-Neelsen staining is used for staining these bacteria. The technique was discovered first by Robert Koch during his pioneering investigations on tuberculosis and was the fore-runner of Ziehl-Neelsen stain used today for diagnosis of these organisms in laboratory. Acid fast bacteria are called so because once these cells get stained with basic fuchsin, these resist decolourization with acid alcohol as can be seen in margin illustiation. This acid fastness red stain is due to high lipid content particularly of mycolic acid in their cell wall. Mycolic acid, is a group of branched chain hydroxyl lipids, which bind covalently to peptidoglycan of cell wall giving the cell surface a waxy, hydrophobic consistency.
Explain Resistance to Infection in Nutritional Care? Amino acids help to build the body's defence mechanisms like antibodies, blood cells, hormones and enzymes so as to prevent
Q. What is the difference between spermatocyte I and spermatogonium? The male germ cells are the spermatogonia (diploid cells, 2n) situated in the testicles and they mature an
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DNA can be divide into fragments using restriction enzymes. (a) Outline the technique used to separate these fragments. (b) What property of the DNA f
Why is the determination of the blood types of the donor and of the recipient important in transfusions? Red blood cells have dissimilar antigens in the outer surface of their
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