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Which part of a living cell is called its control centre?
A. The cell wall
B. The nucleus
C. The cytoplasm
D. The membrane
Correct Answer Is Option = The nucleus
Notes / Explanation
The part of a living cell that is called its control centre is the nucleus, which directs and controls the activities of the cell. The cell is the basic unit of which all living things are made, and each cell, though very small, is a complex and organised structure with different parts, each having its own function. Among these parts, the nucleus is often described as the control centre or the brain of the cell, because it directs and controls the activities of the cell and contains the information that governs how the cell works. The nucleus is usually a rounded structure located within the cell, and it contains the material that carries the instructions for the working of the cell and for the characteristics of the living thing. This material carries the information, in the form of a kind of code, that determines the features of the living thing and that controls the making of the substances the cell needs and the carrying out of its functions. The nucleus, through this information, directs the activities of the cell, controlling what the cell does and how it grows, functions and reproduces. The information contained in the nucleus is also passed on when cells divide to form new cells, and it is passed from parents to offspring, so that the characteristics of living things are inherited. Because it contains this vital information and directs the activities of the cell, the nucleus is essential to the life and functioning of the cell, and it is fittingly described as the control centre. Not all cells have a nucleus of this kind; the simplest living things have cells without a distinct nucleus, but the cells of plants, animals and many other living things do have a nucleus. The study of the cell and its parts, including the nucleus, is a fundamental part of the study of living things. For PPSC and other competitive examinations, the key points to remember are that the part of a living cell called its control centre is the nucleus, that the cell is the basic unit of which all living things are made, that the nucleus directs and controls the activities of the cell and contains the material that carries the instructions for the working of the cell and the characteristics of the living thing, and that this information is passed on when cells divide and from parents to offspring, so that characteristics are inherited.
