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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.
Define Changes in Gluten Proteins during Dough Formation? Initially, gluten is formed when flour and water are mixed together. The proteins in the flour, glutenin and gliadin c
Definition and applications
Define Quantitative or Analytical Method for Estimation of Nitrogen and Protein? You may recall reading earlier that proteins contain nitrogen along with carbon, hydrogen and s
Ovipary, Vivipary and Ovovivipary In each case of external and in some cases of internal fertilisation, development of the fertilized egg (zygote) occurs outside the mother's
Question 1 Write a short note on the following 1 Microinjection 2 Bio catalysis Question 2 What is RFLP? With help of schematic diagr
PHARYN X - Commom system between digestive system and respiratory system. In it gullet and glottis present.Gullet leads to oesophagus. Glottis lead to trachea. Wall of p
Q. What is the approximate pH of the salivary secretion? Is it an acid or basic fluid? What are the main functions of saliva? The saliva pH is approximately 6.8 it is therefore
describe the two scientific models for evolution (gradualism, punctuated equilibrium)
Explain the Mortality and Survivorship Curves? Mortality : Just as a population has a birth rate, so does it have a death rate. A populations rate of death, or the number of
How is synthesis of soluble proteins taking equatorial part on the surface of lens? Synthesis of soluble proteins taking equatorial part on the surface of lens as follows: 1
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