Functions of a Cell
- Structure and Support-Cells provide the structural basis of all organisms.
- Growth-Cells are responsible for the growth of the organism.
- Transport-Cells import the nutrients that are used in the different chemical processes which take place inside them. As a result of these processes, a waste product is produced. Cells then work to get rid of this waste. In this manner, small molecules such as oxygen, carbon dioxide, and ethanol pass through the cell membrane by diffusion. This method is known as passive transport. On the other hand, larger molecules, like proteins and polysaccharides, go in and out of the cell via active transport.
- Energy Production-Organisms need the energy to perform different chemical reactions. In plants, the energy comes from the process of photosynthesis, while in animals the energy comes via respiration.
- Metabolism-Cell is responsible for metabolism, including all the chemical reactions that take place inside an organism to keep it alive.
- Reproduction-A cell helps in reproduction through the processes of mitosis (in more evolved organisms) and meiosis.
CBSE Class 9 Notes Science Chapter 5 – The Fundamental Unit of Life
Notes of The Fundamental Unit Of Life of Class 9 Chapter 5: The fundamental unit of life is the cell. All living organisms are made up of fundamental building blocks which form the fundamental unit of life called cells. Whether it is a plant, animal, or microorganism; these basic units define all their structural and functional abilities.
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