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Explain the Gram Staining technique?
Gram staining is a differential staining procedure which divides bacteria into two groups: Gram positive and Gram negative, based on staining properties. The gram stain was developed in 1884 by the Danish Physician, Dr. Christian Gram. It is one of the most important and widely employed staining procedure in bacteriology.
It is very useful and is almost essential in identifying an unknown bacteria. The basis of gram staining is the difference in cell wall composition of two types of bacterial cells. Gram positives have thick cell wall, made up of multi-layered peptidoglycan with extensive cross-linking. On the other hand, gram negative cell wall has a very thin peptidoglycan layer surrounded by outer lipid rich outer membrane. There is no outer membrane in case of gram positives. This difference in cell wall leads to decolourization of gram negatives but not gram positives by decolourizing agent i.e., ethanol or acetone.
Explain the The Lysogenic Cycle in diversity of life? The Lysogenic Life History of Bacteriophage Viruses. Even though viruses are structurally simple, consisting of merely a n
Zinc deficiency Zinc is essential for several physiological functions in the body such as protein synthesis, carbohydrate and nucleic acid metabolism, and foetal growth. The de
Could you survive on a diet which contained no carbohydrate? It should be possible to survive without carbohydrate as energy can be obtained from fats and proteins.
Peculiarities of Mitosis - Cleavage From the following you will learn that the mitosis in the phase of cleavage has some striking peculiarities: a) Synchronization of cell
Myocardial contractility is mostly dependent on the level of sympathetic nerve activity and is also increased by circulating catecholamines and inotropic drugs like dopamine and do
E mb ryonic stem cells (ES): These are pleuripotent cells of early embryo (blastocyst) capable of giving rise to all differentiated cells, including germ line cells. Em
what are the disadvantages of protozoa?
Efficiency of feed utilization on complete feeds The complete diet concept is based on group rather than individual feeding and usually involves much fewer changes in diet for
Agricultural activities - Cause of Air Pollution Agricultural activities too are a major cause of air pollution. About 60 to 65% of carbon dioxide is produced from burning of
some infomations about reproduction
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