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Explain the Decolourizing Agent - Ziehl-Neelsen Method?
Acid alcohol - a mixture of 95% ethanol and 3% HCI - is used for decolourization. Before decolourization, smear is allowed to cool to make waxy substances hardened. As primary stain is more soluble in cellular waxes than in decolourizing solution, acid-fast bacteria retain the primary stain. However, all non-acid fast bacteria loose primary stain because of the lack of cellular waxes.
Examine the differences between DNA and RNA. Explain why DNA is the most favorable molecule for genetic material and how RNA compares to it in this respect.
Active Transport We have mentioned above that Transmembrane potential develops due to active transport of ions (H + ) outside the cell. Since this transport takes place again&
What is Physical Accommodation Physical Accommodation is the actual physical deformation in the lens power. It is measured in diopters, e.g., if the focussing power of the eye
Explain about the primary protein derivatives? a) Proteins: These are the insoluble products which result from the incipient action of very dilute acids or enzymes. e.g. casein
Describe the location and structure of the pituitary gland and explain its structural and functional relationships with the hypothalamus.
Why do vestigial structures persist in modern organisms? Explain the evidence that indicates that species evolve over time. The environment will not select for or against
What is the molecular composition of hemoglobin? Does the functionality of hemoglobin as a protein depend upon its tertiary or upon its quaternary structure? Hemoglobin is a mo
Definition of probiotics and prebzotics? An early definition of probiotics is 'organisms and substances which contribute to intestinal microbial balance'. Later the word 'subst
Explain the interaction of vitamin a with Zinc? Its deficiency interferes with vitamin A metabolism. It leads to a reduction in the synthesis of plasma proteins, particularly,
Define Meitrac System Instrument Removal System a) Trephining bur to remove dentine and uncover the coronal end of the file b) Extractor of appropriate size is placed over t
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