Tag: inter cellular movement
Questions Related to inter cellular movement
The uniformly sweet taste of coffee or tea is due to
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Spreading
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Permeability
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Distribution
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Diffusion
Diffusion is the net movement of a substance from a region of high concentration to a region of low concentration. A gradient is a change in the value of a quantity (e.g., concentration, pressure, temperature) with the change in another variable (e.g., distance). The uniformly sweet taste of coffee or tea is also an example of diffusion. Here, when added tea or coffee powder to milk/water, movement of substance takes place from high concentration to lower concentration. Thus, the correct answer is option D.
A cell with fully elastic wall is placed in hypertonic solution. What will not happen?
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Change in cell size and shape.
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The whole cell will shrink.
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Cytoplasm shrinks from the cell wall and undergoes plasmolysis.
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Decrease in cell size.
A hypertonic solution is a solution which contains more amount for dissolved salts i.e., the concentration of solute is more.
When a cell is placed in hypertonic solution since the solvent concentration is less, the solvent is exerted from the cell and the cell undergoes cytolysis.
The pressure inside the cell is high and the cell may undergo osmolysis.
Cytoplasm will not shrink but cell solvent will come out it is not plasmolysis because the only periphery of the cell is not affected. So it cannot undergo plasmolysis.
So the correct answer is 'Cytoplasm shrinks from the cell wall and undergoes plasmolysis'.
The external solution having same concentration as that of cell sap is known as
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Hypertonic solution
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Isotonic solution
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Hypotonic solution
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Ultratonic solution
When cells are in isotonic solution, movement of water out of the cell is exactly balanced by movement of water into the cell.
There is nothing like ultratonic solution.
The external solution having more concentration than the cell sap is known as
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Hypertonic solution
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Isotonic solution
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Hypotonic solution
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None of the above
When cells are in isotonic solution, movement of water out of the cell is exactly balanced by movement of water into the cell.
When a cell is placed in 0.25 M concentrated sugar solution, there is no change in it. The concentration of cell sap would be :
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0.025 M
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0.25 M
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25 M
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None of the above
The external solution having less concentration than the cell sap is known as
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Hypertonic solution
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Isotonic solution
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Hypotonic solution
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Ultratonic solution
When cells are in isotonic solution, movement of water out of the cell is exactly balanced by movement of water into the cell.
To initiate cell photosynthesis, salt solution should be
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Isotonic
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Hypotonic
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Hypertonic
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None of the above
Water is absorbed from outside solution only when it is
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Isotonic
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Hypotonic
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Hypertonic
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None of these
Water is absorbed from outside solution only if the external medium is hypotonic because a hypotonic solution has more concentration of solvent molecules than the fluid inside the cell. So, solvent molecules move inside the cell from the region of higher concentration to the lower concentration by the process of endosmosis. The cell swells and increases in size.
Uniformly sweet taste of tea or coffee is due to
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Spreading
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Osmosis
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Permeablity
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Diffusion
While preparing coffee or tea we pour coffee or tea powder at one point but it is uniformly sweet. It is due to diffusion of the solvent from the high concentration to lower concentration and it becomes uniformly sweet taste.
State whether the following statements are true or false.
Cells placed in an isotonic environment will die as they swell and burst.
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True
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False
The movement of solutes from lower to higher concentration is called as osmosis. Isotonic solutions are those in which concentration of solute and solvent are same in the outside as well as inside of cells. When cells are placed in the isotonic solution they will remain unaffected as water movement in and out of the cells will be the same . while in hypotonic solution cells will absorb more water and thus become swollen and will burst eventually.