AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If cells are placed in a strong sugar solution, water will ____
A
pass from the sugar solution to the cells
B
pass back and forth
C
pass from the cells to the sugar solution
D
stay in the cell
Explanation: 

Detailed explanation-1: -Explanation: The cells will shrink if placed in a solution of sugar or salt in water due to osmosis. When an animal cell and plant cell will be kept in a solution of sugar or salt in water, the cell will undergo the process of osmosis.

Detailed explanation-2: -If we place a cell in the hypertonic solution like in sugar or salt solution, the cell will shrink. It is because the movement of water takes place from lower solute concentration to higher solute concentration i.e from inside sugar solution to attain equilibrium. It results in shrinkage of the cell.

Detailed explanation-3: -When plant cells are placed in concentrated sugar solutions they lose water by exosmosis and they become flaccid; this is the exact opposite of turgid and the contents of the cells have shrunk and pulled away from the cell wall: they are said to be plasmolysed.

Detailed explanation-4: -If a plant cell is placed in a hypertonic solution, the plant cell loses water and hence turgor pressure by plasmolysis: pressure decreases to the point where the protoplasm of the cell peels away from the cell wall, leaving gaps between the cell wall and the membrane and making the plant cell shrink and crumple.

Detailed explanation-5: -In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

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