Control Mechanisms in Genetics


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Control Mechanisms in Genetics
1011302Control Mechanisms in GeneticsThe chromosome of a bacterium like Escherichia coli (E. coli) is almost 1 mm in total length and is composed almost entirely of DNA. Virtually all this DNA is active or potential gene material that has the capacity to code for as many as 4000 different polypeptide chains. Perhaps as many as 700 functional enzymes are present in the bacterial cell at any one time, and there is considerable variation in the number of molecules of each protein present at a particular time. Some proteins may be absent or present in just a few copies.This scenario suggests that there are elaborate mechanisms for the regulation of gene expression in…
Citation
George H. Fried; George J. Hademenos: Schaum's Outline of Biology, Fourth Edition. Control Mechanisms in Genetics, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export