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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.
Into which subphyla are the protochordates divided? What are some representatives of each protochordate subphylum? Urochordates (or tunicates) and cephalochordates are the two
How do genetic mutations influence biological diversity? Too frequent or too extensive genetic mutations usually are deleterious for individuals and species. These mutations fr
main external morphological feature that differentiates platyhelminthes from nematodes
Is Neuron A synapses onto Neuron B Consider Neuron B in the frog central nervous system whose plasma membrane has a newly discovered ligand-gated ionotropic receptor, named the
What is Intra oral and Extra Oral A) Intra oral a) Frontal in occlusion b) Left and right occlusion (Using intra oral photography mirror) c) Occlusal view maxillary
Define characteristics of prebiotics? Characteristics of prebiotics Are non-digestible dietary/food ingredients Are not hydrolyzed/absorbed in the upper GIT, reach
In studies of human body, which of the below terms is used to describe hereditary condition associated with an excessively high level of uric acid in blood? a) Uric ptosis b
Gastropods - Feeding and Digestion in Molluscs In several gastropods the digestion is extracellular. Though, some herbivore gastropods like Crepidula are ciliary feeders and h
define inflorescence and explain in detail about it''s types
The highest possible magnification that can obtain when using using a microscope?
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