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प्रश्न
What is osmosis?
लघु उत्तर
उत्तर
- The movement of water molecules from a region of high concentration to a region of low concentration through a selectively permeable membrane is called osmosis. It is a special case of diffusion, where the medium is water.
- For example, if the medium surrounding the cell has a higher water concentration than the cell i.e., if the solution is a dilute solution, then the cell will gain water by osmosis.
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संबंधित प्रश्न
Where are chromosomes found in a cell? State their function.
Match the name of the organelle given in Column A with its function given in Column B.
| Column A (Organelle) | Column B (Function) | ||
| 1 | leucoplast | a | help in cell division |
| 2 | nucleus | b | transport of material |
| 3 | ribosomes | c | making food |
| 4 | mitochondria | d | digesting foreign bodies |
| 5 | endoplasmic reticulum | e | storage of starch and proteins |
| 6 | golgi bodies | f | making the cell turgid |
| 7 | chloroplast | g | making proteins |
| 8 | centrosome | h | controlling all the vital activities of a cell |
| 9 | vacuole | i | releasing energy |
| 10 | lysosomes | j | synthesis of cell wall in a plant cell |
What is the function of the following?
Mitochondria
Expand - RER
"Nucleus is the controller of the cell" - prove this statement.
Describe the structure of the chromosome in brief.
What is a 'cell'?
Answer the following question.
Why is the cell called the structural and functional unit of life?
I take part in food production of a cell. Who am I? ____
Make sketches of animal and plant cells which you observe under microscope.
