THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oxygen exiting leaves after photosynthesis
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A raisin swelling in a cup of water
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Water changing from a liquid to a gas
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Oxygen moving into an animal cell
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Detailed explanation-1: -Swelling up of a raisin on keeping in water is known as Osmosis.
Detailed explanation-2: -Raisins swells because of osmosis. Solution outside the raisin has a higher concentration of water molecules. Therefore, water from outside enters the raisin through the process of osmosis and hence the raisin swells up when kept in water. The outer membrane of the cells of the raisin acts as a semi-permeable membrane.
Detailed explanation-3: -Final Answer: Uptake of water by root hair and swelling of seed when put in soil are examples of osmosis.
Detailed explanation-4: -Endosmosis: Osmosis is the diffusion of water across a selectively permeable membrane from a region of high water concentration to a region of low water concentration. Swelling of resins in water is called endosmosis.
Detailed explanation-5: -A common osmosis example seen in real life is the preservation of food. Food is preserved in salt or sugar solution (hypertonic) to allow water to be pulled out of the cells of the foods (hypotonic).