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The initial stage of packaging have the binding of the chromosomal DNA to histones. Whole, in chromosomes the ratio of the DNA to histones on a weight basis is around 1:1. There are five main types of histones called as H1, H2A, H2B, H3 and H4. Histones are very basic proteins; about 25 percent of their amino acids are lysine or arginine so histones have a vast number of positively charged amino acid side-chains. These positively charged groups therefore bind to the negatively charged phosphate groups of DNA. Not surprisingly giving their importance in packaging DNA the amino acid series of histones have been highly conserved in evolutio.
Explain risk factor at the global perspective in heart diease? While the risk of Cardio-vascular diseases has been found to be variable in different ethnic groups with the high
Explain the Transmission Electron Microscope Here, thin and dehydrated specimen is used. Electrons pass through the specimen and form image on to photographic film. These are u
To make a 40 mg/mL solution of kanamycin (MW 582.6) how many grams of kanamycine would you dissolve in 500 mL of water?
Process of Memory: There are three stages of memory Encoding process: It is the process of receiving sensory input and transforming it into a form or code, which can be stored.
A codon comprise three nucleotides. There are four possible nucleotides, each of which has an equal probability of being in any one of three spots. How many possible codons exist?
Explain about the Foods Effect on Drug Utilization? The following illustrations highlight the effect of food on drug utilization. Liver and green leafy vegetables can decrea
How cells are studied We learnt about the evolution of the cell and a historical account of the growth of cell biology. In this section, you will study about the various tools
Explain the importance of parent material Part of these weathered minerals are transported away by volcanoes, wind, water, ice, and waves etc. These very factors transport th
Q. Define Pulmonary angiography? Pulmonary angiography is the angiographic opacification of the main and pulmonary artery and its branches. By radiographic techniques, it is po
levels of biodiversity
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