Answer
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Hint: The nucleus is the master organelle of a cell. It is usually found in the centre of a cell. The nucleus is a double membrane organelle that encloses the genetic material of the cell. It is the hereditary unit of organisms. The nucleus guides and regulates the cell function and division.
Complete answer: The nucleus is the largest cell organelle of the cell which is a double membrane protected organelle. The covering of the nucleus is called the nuclear membrane. The membrane consists of pores through which the nucleus and cytoplasm exchange specific materials. The space inside the nucleus is filled with nucleoplasm. The nucleoplasm contains chromosomes which are the condensed DNA molecules. The chromosomes are thread-like structures. Another important thing in the nucleosome is the nucleolus. The nucleolus is a spherical structure that forms ribosomes. The chromosomes consist of genes. The genes encode cellular proteins that further assists cell functioning. Also, genes are the units that get transferred from parent to offspring. All eukaryotic cells consist of a membrane-bound nucleus. On the other hand, prokaryotes do not contain a nucleus, the genetic material lies freely in the cytoplasm. The region in a prokaryotic cell where the chromosomes are present is called the nucleoid. Important cellular processes like replication and transcription occur inside the nucleus. Thus, the nucleus directly regulates cellular functions. Replication is a process of the formation of DNA from existing DNA molecules. This process occurs during cell division. The nucleus is the last to divide into the newly formed daughter cells.
Note: Almost all cells of the body contain a nucleus. The nucleus assists in gene regulation. Gene regulation means switching on and off of the genes for their expressions. Cells specialized to perform beating of the heart have their genes off for thinking function as in brain cells. The RBCs are the cells that lack a nucleus and hence they die in a short period of life.
Complete answer: The nucleus is the largest cell organelle of the cell which is a double membrane protected organelle. The covering of the nucleus is called the nuclear membrane. The membrane consists of pores through which the nucleus and cytoplasm exchange specific materials. The space inside the nucleus is filled with nucleoplasm. The nucleoplasm contains chromosomes which are the condensed DNA molecules. The chromosomes are thread-like structures. Another important thing in the nucleosome is the nucleolus. The nucleolus is a spherical structure that forms ribosomes. The chromosomes consist of genes. The genes encode cellular proteins that further assists cell functioning. Also, genes are the units that get transferred from parent to offspring. All eukaryotic cells consist of a membrane-bound nucleus. On the other hand, prokaryotes do not contain a nucleus, the genetic material lies freely in the cytoplasm. The region in a prokaryotic cell where the chromosomes are present is called the nucleoid. Important cellular processes like replication and transcription occur inside the nucleus. Thus, the nucleus directly regulates cellular functions. Replication is a process of the formation of DNA from existing DNA molecules. This process occurs during cell division. The nucleus is the last to divide into the newly formed daughter cells.
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Note: Almost all cells of the body contain a nucleus. The nucleus assists in gene regulation. Gene regulation means switching on and off of the genes for their expressions. Cells specialized to perform beating of the heart have their genes off for thinking function as in brain cells. The RBCs are the cells that lack a nucleus and hence they die in a short period of life.
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