LABORATORY REVIEW
DIFFUSION AND OSMOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Alcohol will move into the cell.
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Alcohol will move out of the cell.
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Water will move into the cell.
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Water will move out of the cell.
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Detailed explanation-1: -If a cell (with 3% alcohol in it) is in a solution of 10% alcohol molecules and the alcohol can cross the cell’s membrane, what do you predict will happen to the alcohol? The oxygen will move out of the cell.
Detailed explanation-2: -A cell has a 1% salt concentration. It is placed into a solution containing a 10% salt concentration. Water will move out of the cell, causing it to shrink.
Detailed explanation-3: -A cell with 5% solute concentration is placed in a beaker with a 1% solute concentration. The cell will gain water and expand.
Detailed explanation-4: -Gases, hydrophobic molecules, and small polar uncharged molecules can diffuse through phospholipid bilayers. Larger polar molecules and charged molecules cannot.
Detailed explanation-5: -Oxygen and carbon dioxide and most lipids enter and leave cells by simple diffusion.