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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.
Are environmental phenotypical changes transmitted to the offspring? Changes caused on phenotypes by the environment are not transmitted to the offspring (unless their primary
You have accidentally mixed up 3 beakers of solutions. One is water. One is pure methanol. One is pure phosphoric acid. What would be a very wrong way to tell the difference betwee
BASIC PRINCIPLES OF EMERGENCY PSYCHIATRY: Nurses handling psychiatric emergencies should keep the following principles in mind: The initial approach to a clienvpatien
Principles of BCC · BCC should be integrated with program goals from the beginning. BCC is a necessary part of diabetes prevention, care and support programs, and providing li
a) What conditions do most seeds need in order to begin germination? b) What other condition do the seedlings need to continue growth to mature plants? a) Most seed
Q. How does the poison cyanide act upon the aerobic respiration? Cyanide is a poison that restrains the last cytochrome of the respiratory chain, interrupting the ATP formation
What is Splitin first heart sound ? In complete RBBB, due to delay of tricuspid closure, the split is wide. In complete LBBB, due to delay of mitral closure the S I is single.
What are the two big groups into which cells are classified? Cells can be divided as eukaryotic or prokaryotic. Prokaryotic cell is the cell that without a delimited nucleus
Q. In what order should Personal Protection be removed? Personal protection is removed in following order: Gloves Mask Glasses Wash hands
Does mitosis properly occur before or after the interphase? Is it a mere "point of view" issue? Mitosis must be considered a succeeding phase after interphase since this
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