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प्रश्न
The most appropriate characteristic of a semipermeable membrane is that
विकल्प
it has minute pores
it has no pores
it allows the solute to pass through but not the solvent
it allows a solvent to pass through freely but prevents the passage of the solute
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उत्तर
it allows a solvent to pass through freely but prevents the passage of the solute
संबंधित प्रश्न
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
Explain how soaked seeds swell up and burst their seed coats.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A&B), the container (A) having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and had somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the firmness and increase in the size of the potato cubes placed in water.
Define the following:
Hypertonic solution
Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.
Name the following:
Movement of molecules from a region of high concentration to a region of low concentration.
The beaker is divided into two chambers A and B. The big circle represents solute and the small circles solvent.
(i) What can you say about the size of the holes in the membrane, if it is to behave semi- permeably between these two?
(ii) Will the solvent molecules pass through the membrane from left to right, from right to left, in either direction or in both directions?
(iii) In which direction will there be a net movement of solvent molecules?
DPD of a cell can be expressed as ______
