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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.
An increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads to A. Increased binding of calcium ions
What are the main conventional symbols and signs used in genetic family trees? In genetic family trees the male sex is usually shown by a square and the female by a circle. Cro
Q. What is Low Gradient Aortic Stenosis? One may come across patients who have severe left ventricular dysfunction and modest gradients across aortic valve. This situation may
Root - Plant Water Relation Root system is directly related to the absorption of water and its growth under field conditions is very much influenced by soil. In dry land agric
The terms ecosystem was introduction by Sir Arthur tensely in 1935. An ecosystem can be defined s " a structural and function unit of biosphere consisting of living organisms and t
Q How are the concepts of the DNA, gene, and proteins characteristics of living beings related? Characteristics of organisms depend on chemical reactions that take place in the
why obwlia is considered to be of special interest in zoologyas an animal showing an intermediate grade of organisation
Glycogen synthase exists in two forms: the phosphorylated form designated as 'D' form is the inactive one and the dephoshorylated form designated as 'I' form is the activ
Explain the Eukaryotic Gene Expression ? Eukaryotic cells regulate the transcription of individual genes, large parts of chromosomes, or even entire chromosomes. Gene expressi
What is digestion? Digestion is the breaking down of larger organic molecules obtained from the diet, e.g. carbohydrates, fats, proteins, into smaller ones, as glucose, fatty a
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