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The original DNA sequence when ,transcribed and translated would yield five successive valine residues. But the altered sequence would correspondingly read one aspartate and four serine residues. Mutations resulting from the addition or deletion of base pairs are called frameshift mutations. So far we have discussed the several ways in which the genetic material could be altered. Mutations could be either spontaneous or induced. In recent years there has been a more clear understanding of the causes of mutational process. Tautomeric shifts, ultraviolet radiations, chemicals such as hydroxylarnine, nitrous acid and a variety of alkylating agents can cause permanent alterations of nitrogenous bases. Aromatic compounds such as acridines can cause addition or deletion of one to more than twenty bases in DNA. We have briefly discussed mutations, a way or source of variability in natural populations. Together with recombinations occurring'at the tjnie of meiosis they form the raw materials for selection to act on. Before we discuss briefly about recombination, let us have a quick look at mutation rates in organisms.
Q. What are the steroids? What are the few examples of steroids with a biological function? Steroids are lipids based in an angular combination of four carbon rings, one ring m
Normal nutrition: a base of therapeutic diet Normal nutrition is the foundation upon which the therapeutic modifications are based. The primary principle of diet nutrition the
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Explain Whey protein concentrates Whey protein concentrates (WPC) are the products derived from whey from which the water, minerals and lactose have been removed. WPC is a wh
Q. What is Sulphonylureas? Sulphonylureas: Tolbutarnide is the mildest and its effect remains for 8 hours hence 2-3 doses need to be taken. Another drug chlorpropamide needs on
Adverse Effects of Famciclovir Famciclovir has been generally well tolerated. Headache, nausea and diarrhea have been reported. Like acyclovir, famciclovir has been associated
discuss why obelia is considered to be a special organism in zoology
about benificial microbes
Q How can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates, arthropods and molluscs? The echinoderm skeleton is int
Define Historical example for Dynamical Network? John Tyson constructed a nonlinear differential equation model representing the majority of the network of biochemical pathways
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