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Explain Counter Stain - Ziehl-Neelsen Method?
Methylene blue is used to stain previously decolourized cells. All non acid-fast bacteria de-stained by acid alcohol now absorbs counter stain and takes on its blue colour. All acid-fast bacteria remained red in colour due to primary stain.
Genus Mycobacterium shows acid fastness. These are aerobic, slightly curved or straight rods that sometimes branch or form filaments. These filaments readily break down into rods and coccoid bodies, when disturbed. Some grow very slowly. Some are free-living saprophytes and some are pathogens, e.g. M. bovis could cause tuberculosis in cattles, M. tuberculosis causes tuberculosis in humans, M leprae causes leprosy in humans. Acid-fast stain has a diagnostic value in identifying these pathogenic mycobacteria.
Q. What is the life cycle of the gymnosperms? As all plants they present a diplobiontic life cycle that is alternation of generations with haploid and diploid stages and the la
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How did muir's impression of man's relationship with nature differ from Susan Fenimore coopers? And How did Gifford Pinchot view nature?
Name the four organisms which are currently in danger of extinction because of human activities?
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Define Essentiality of Vitamins for Growth of Micro-Organism Vitamins are also essential in small amounts for cellular activities and growth. These are also the coenzymes for a
In a neuron with a resting potential of -65 mV, the distribution of which ion across the neuronal membrane represents the LEAST potential electromotive force (EMF)? A. Potassium
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Progress on these biological issues needs both that more mathematics and statistics be brought to bear on them and that new mathematical and statistical tools be prepared. All the
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