Final answer:
The nucleus is a membrane-bound, eukaryotic, specialized cell organelle that directs all cellular activities.
Step-by-step explanation:
The nucleus is a membrane-bound, eukaryotic, specialized cell organelle that directs all cellular activities. It contains the cell's genetic material, called DNA, which provides instructions for the synthesis of proteins and the regulation of cell functions.
Inside the nucleus, there is a dense structure called the nucleolus, which is involved in the production of ribosomes, the cellular machinery responsible for protein synthesis.
The nucleus is essential for the survival and functioning of eukaryotic cells, as it controls gene expression and coordinates cellular activities.
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