Cell The Unit of Life Class 11 CBSE Revision Notes
Cell The Unit of Life Class 11 Notes – The chapter explains that all living and non-living organisms are made of cells. Also, the cells vary in shape, size, structure, and function. Furthermore, based on the presence and absence of membrane that bounds nucleus and other organelles they can be named as eukaryotic and prokaryotic. Moreover, a eukaryotic cell typically contains a cell membrane, cytoplasm, and nucleus. In addition, the plant cells have a cell wall outside the cell membrane. Most noteworthy, the plasma membrane is selectively permeable and facilitates the transport of several molecules. Furthermore, the endomembrane system includes the Golgi complex, ER, lysosomes, and vacuoles. Besides, all the cell organelles perform different but specific functions.
The centrosome and centriole form the basal body of cilia and flagella that aids locomotion. In addition, in animal cells, the centrioles form the spindle apparatus during cell division. The nucleus contains nucleoli and chromatin network. Besides, Endoplasmic reticulum contains tubules or cisternae. Also, they are of two types- rough and smooth. Moreover, ER assists in the transport of substances, synthesis proteins, lipoproteins, and glycogen. Lysosomes are single membrane structures that contain enzymes for the digestions of macromolecules. Furthermore, ribosomes perform the function of protein synthesis. Mitochondria aids in oxidative phosphorylation. Most noteworthy, the nuclear envelope encloses the nucleus. This nuclear envelope is a double membrane structure with nuclear pores.
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Sub-topics covered under Cell The Unit of Life
- Introduction to Cell and Cell Theory – This topic defines a cell and cell theory given by Jakob Schleiden.
- Prokaryotic Cell – The topic explains the prokaryotic cell and its components.
- Eukaryotic Cell – This topic overview the eukaryotic cell and its components and their functions.
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