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Q. What is the virus that causes flu? Why doesn't the body produce permanent immunity against that virus? How does the vaccine against flu work?
Flu is a disease caused through the influenza virus, a highly mutant DNA virus, Due to the high mutation rate of the virus that forms many different strains flu always presents epidemic features in affected populations and people may have several flu episodes during life (the immune response made from previous infections is not proficient in future infections).
The injection against flu is a vaccine made of attenuated virus of three different strains. Each year the World Health Organization (WHO) researches and determines which the strains that should compose the vaccine are. This is a approach to face the high mutation rate of the virus.
Q. Define the Role of Protein and Purines? Cellular materials of plants, grams and legumes and animal glandular organ meats (liver, pancreas brain, kidneys) contain nucleoprote
Suggest a mechanism that would allow a plant to grow better if it had intermorph neighbors than if it had intramorph neighbors. Think about the degree of genetic similarity between
Q. How can the blood coagulation (clotting) process be described? Blood clotting encompasses a sequence of chemical reactions whose respective products are enzymes that catalyz
Tall (T) plants are dominant and short (t) plants are recessive. Two heterozygous tall plants are crossed. What percentage of the offspring will be tall?
Define observation or inference for barfoed test? 1. Reddish brown precipitate is seen on the sides and bottom of the tube. The precipitate of the sides and bottom indicates th
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EGG S OF HEN It is a meiolecithal egg which is oval. The animal pole is found in the form of a small germinal disc. The vegital pole has two types of yolk viz. White yol
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