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Q. Why are vaccines made of the own disease agent or of fragments of it?
The goal of vaccines is to artificially induce a specific primary immune response (and the consequent formation of memory cells and antibodies) concerning a given disease or infection in order to immunize the individual against infections by the pathogenic agent in the future.
Since every antibody does not act against a variety of antigens but instead it acts only against its specific antigen it is necessary for the immune system to make contact in some way with the antigen against which the immunization is wanted. The reconnaissance of specific molecular portions of each antigen origins the immune system to produce the specific variable portion of the immunoglobulins to attack that antigen. Therefore to induce the active immunization it is necessary to inoculate into the body small parts of the agent entirely (dead or inactivated) or the infectious agent.
a) What does secondary productivity in an ecosystem indicate? b) List any two factors by which productivity is limited in aquatic ecosystems
An episode of diarrhoea can be acute (recent origin) or chronic (extended duration and repeated episodes) in nature. You may recall reading in the Food Microbiology ans Safety Cour
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Q. What are the organs that are part of the male genital system? The organs that comprise the male genital system are the testicles, the vas deferens, the seminal vesicles, the
What is the result of Post Myocardial Infarction Ventricular ? Results: Hospital mortality may be as high as 30 per cent. This depends on the extent of infarction and- pre-op
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Define the Iodine Test - Carbohydrates? This test is given by polysaccharides and is not given by monosaccharides or disaccharides. Principle Iodine forms a coloured ad
Classification of Freshwater Ecosystems Fresh water ecosystems depend on the terrestrial ecosystems for large quantities of organic and inorganic matter which are constantly a
Q. In which chloroplast structure are chlorophyll molecules found? Chlorophyll molecules are placed in an organized manner in order to improve the exposure to light on the thyl
Feeding management Feeding management deals about the in-house management in which the feed consumption pattern is well understood in the sheds and suitable alterations are made
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