What is a nucleus ? Explain …

Nucleus

• The nucleus is small, round and membrane bound structure found in cell.
• The fluid inside the nucleus surrounded by nuclear membrane is called nucleoplasm.
• It controls the cell’s growth and reproduction because it contains cell's hereditary information.
• It is covered by dual layer called nuclear membrane.
• The nuclear membrane contains pores due to which materials can travel both inside the nucleus from its outer surrounding i.e. cytoplasm.
• The nucleus contains some thread like structures called chromatin. It exists during the resting stage of cell.
• The chromatin contains DNA (Deoxy-ribo nucleic acid), RNA (Ribo Nucleic acid) and proteins.
• The nucleus contains some rod shaped structures in a cell that contains the hereditary information. They are called chromosome.
• They are formed when the chromatin condenses together when the cell is about to divide.
• Chromosomes contain DNA and nuclear proteins.
• They contain the hereditary information for inheritance of features from the parents to the offspring as DNA.
• The DNA molecules contain the information for construction and organization of cells. Genes are the functional segments of DNA.
• Human body has 23 pairs of *** chromosomes. A boy has one X chromosome and one Y chromosome whereas a girl has two X chromosomes.
• The nucleus of cell divides itself to give rise to new offsprings.