مدرس المادة
Nucleus:
ü Is a membrane-enclosed organelle found in eukaryotic cells. It contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes.
ü The genes within these chromosomes are the cell's nuclear genome.
ü The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression.
üeveryone knows that the genes, control heredity from parents to children, but most people do not realize that these same genes also control the day-to-day function of all the body’s cells.
ü The genes control cell function by determining which substances are synthesized within the cell—which structures, which enzymes, and which chemicals.
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