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Explain the Primary Stain - Ziehl-Neelsen Method?
Ordinary aqueous stains like methylene blue, crystal violet, etc. are not able to stain most of the species of Mycobacteria. Carbol fuchsin, a red mixture of basic fuchsin and phenol can be used for staining these bacteria. Basic fuchsin, binds to carboxylic acid group of mycolic acid and phenol enhances penetration of basic fuchsin into lipid. Penetration is further enhanced by slow heating to steaming for 2-3 minutes. This drives the stain inside the cytoplasm. In modified Ziehl-Neelsen method, instead of heating, a wetting agent - Turgitol - can be added to the stain. This agent reduces surface tension between the cell wall of the mycobacteria and the stain. After staining, all cells become red.
MIDDLE LAMELLA It is thin, amorphous, intercellular matrix between 2 adjacent plant cell. The cells of plant tissue generally cemented together by an intercellular matrix
Explain Other lipids in biological compound? Other Lipids : Another important type of lipids are the steroids, with a basic structure consisting of four interconnecting carb
Q. What are the substances that are constitute the chromatin? What is the difference between chromosome and chromatin? The chromatin, dispersed in the nucleus, is a set of fila
It arises from a one embryonic cell known as neuroblast Types of neuron: According to number of process¬ (a) Unipolar: Only axon is there. e.g. mesencephalic nucleus. (b)
Bile salts or bile acids are polar derivatives of constitute and cholesterol the major pathway for the excretion of cholesterol in mammals. In the liver, the cholesterol is circul
Suggest a mechanism that would allow a plant to grow better if it had intermorph neighbors than if it had intramorph neighbors. Think about the degree of genetic similarity between
How do taenias classify according to the division of sexes? Taenias are monoecious (hermaphrodite), the similar individual has female and male reproductive organs and undergoes
Procedure of radiographic template It is very similar to a flasking procedure. Mix slow setting irreversible hydrocolloid (alginate) with cold water (to gain more working ti
For measuring the rate of transpiration of a twig using Ganong's potometer, learner A cuts the twig and fits it in the broad end of the water-filled potometer. Learner B cuts the t
What is Ceramics A kind of material that is "bone like" based on the specific ratios of calcium and phosphorous in particular crystalline structures. Ceramics are inorganic, no
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