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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.
Explain Radial Symmetry in Classification of the Animal Kingdom? All of the animals besides the sponges are considered to belong to the Eumetazoa, or the "true animals" because
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What are cotyledons? Cotyledons, or seed leaves, are structures formed by the embryo of angiosperms to absorb nutrients from the endosperm and to keep and transfer these nutrie
The use of the gums in various foods may affect the following functional properties: 1. Water-binding capacity 2. Rheological properties 3. Capacity to form film or gel
The feasible methods of stabilization within the constraints of retaining natural status: Complex formation: Anthocyanin occurs naturally as complexes which are relatively st
Problem: Explain the procedure for import of cosmetics in US. - Briefly explain the procedure for import of cosmetics in US What are the major points to be considered whe
Q. Effect of Destruction of Microbial Barriers? Physical damage to the integument allows microbial invasion of the underlying nutrient-rich tissues and it is a common observati
What are bacteria? Bacteria are unicellular and prokaryotic beings. Bacteria have simple organization; they present an , plasma membrane, external cell wall, circular DNA withi
Define the Effect of Deficiency of Vitamin K? Both excess and low intakes can have serious implications on human health, although such conditions arise rarely, these can often
Feeding Mechanisms of Animals All animals have evolved successful methods for extracting their required nutrition from the environment. Thus we find a diversity of feeding mec
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