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Cell and its Functions - Science, Class 8 Video Lecture
FAQs on Cell and its Functions - Science, Class 8 Video Lecture
| 1. What is a cell and what are its functions? |  |
Ans. A cell is the basic structural and functional unit of all living organisms. It is responsible for carrying out various functions necessary for the survival of an organism. The functions of a cell include providing structure and support, carrying out metabolic activities, storing genetic information, and reproduction.
| 2. How does a cell provide structure and support? | |
Ans. Cells provide structure and support through their cell membrane and cell wall. The cell membrane helps in maintaining the shape of the cell and regulates the movement of substances in and out of the cell. In plants, the cell wall provides additional support and protection to the cell.
| 3. What are the metabolic activities carried out by cells? | |
Ans. Cells carry out various metabolic activities such as respiration, photosynthesis, and synthesis of proteins and other molecules. Respiration involves the conversion of nutrients into energy, while photosynthesis is the process by which plants convert sunlight into energy. Cells also synthesize proteins, enzymes, and other necessary molecules for the functioning of the organism.
| 4. How do cells store genetic information? | |
Ans. Cells store genetic information in the form of DNA (deoxyribonucleic acid). DNA is a double-stranded molecule that contains the genetic instructions for the development and functioning of an organism. Cells replicate and transmit this genetic information during cell division to ensure the continuity of life.
| 5. How do cells reproduce? | |
Ans. Cells reproduce through a process called cell division. There are two types of cell division: mitosis and meiosis. Mitosis is a form of cell division that produces two identical daughter cells, each with the same number of chromosomes as the parent cell. Meiosis, on the other hand, is a specialized form of cell division that produces gametes (sperm and egg cells) with half the number of chromosomes as the parent cell.
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Dec 19, 2024 Last updated |
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