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What are the components of cell biology class 9 |
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Answer» Cell is generally composed of three basic components:(i) Cell wall and cell membraneCell Wall is found in plant cells outside the plasma membrane.It is a rigid covering made up of cellulose which a complex substance is providing structural support to the plants.The contents of the cell wall contracts during loss of water in plant cells by the process of osmosis.Due to the presence of cell wall plant cells can withstand greater changes in the surrounding media due to the exertion of equal pressure to the cell when it swells up by taking up water through osmosis in a hypnotic media.(ii) NucleusThe nucleus is small, round and membrane bound structure found in cell.The fluid inside the nucleus surrounded by nuclear membrane is called nucleoplasm.It controls the cell’s growth and reproduction because it contains cell\'s hereditary information.It is covered by dual layer called nuclear membrane.The nuclear membrane contains pores due to which materials can travel both inside the nucleus from its outer surrounding i.e. cytoplasm.(iii) CytoplasmA thick solution composed of water, salts, and proteins that fills the cell is called cytoplasm.It is surrounded by cell membrane.The nucleus of the cell is surrounded by the cytoplasm Cell is generally composed of three basic components:(i) Cell wall and cell membrane\tCell Wall is found in plant cells outside the plasma membrane.\tIt is a rigid covering made up of cellulose which a complex substance is providing structural support to the plants.\tThe contents of the cell wall contracts during loss of water in plant cells by the process of osmosis.\tDue to the presence of cell wall plant cells can withstand greater changes in the surrounding media due to the exertion of equal pressure to the cell when it swells up by taking up water through osmosis in a hypnotic media.(ii) Nucleus\tThe nucleus is small, round and membrane bound structure found in cell.\tThe fluid inside the nucleus surrounded by nuclear membrane is called nucleoplasm.\tIt controls the cell’s growth and reproduction because it contains cell\'s hereditary information.\tIt is covered by dual layer called nuclear membrane.\tThe nuclear membrane contains pores due to which materials can travel both inside the nucleus from its outer surrounding i.e. cytoplasm.(iii) Cytoplasm\tA thick solution composed of water, salts, and proteins that fills the cell is called cytoplasm.\tIt is surrounded by cell membrane.\tThe nucleus of the cell is surrounded by the cytoplasm |
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