Diffusion and Osmosis
Trending Questions
What Is Osmosis?
What would happen to a red blood cell (RBC) placed in a solution of high salt concentration?
- It would fill with water and burst.
- Nothing - the solution is isotonic to the interior of the red blood cell
- The red blood cell would shrink as it loses water to the salt solution in the test tube.
- None of these
In brief, state what happens when dry apricots are left for some time in pure water and later transferred to a sugar solution?
Question 32
Why does the skin of your finger shrink when you wash clothes for a long time?
7 characteristics of living organisms- (mrs.gren)
A. The gaseous exchange between the closely placed cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.
- Only A and C
- Only B and C
- Only A and B
- Only C and D
The process by which water enters through a selectively permeable membrane is called _____.
- Cell bursts
- Cell shrinks
- Cell size unchanged
What is the cell plate and cleavage method of cytokinesis
Question 9 (iii)
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following:
(iii) Explain why water does not gather in the hollowed out portions of A and D.
6 (b )Cartliginious fish
Which of the following statements is true about the condition necessary for osmosis to take place?
The concentration of water molecules should remain constant.
The process of osmosis takes place through a semi-permeable membrane.
The process of osmosis does not take place through a semi-permeable membrane.
All of the above
Define the following terms:
(b) Endosmosis
What is cell sap
- A solution whose water concentration is lower than the internal concentration.
- A solution whose water concentration is more than the internal concentration.
- A solution whose water concentration is same as compared to internal concentration.
- None of the above.
If the cell is placed in a hypertonic solution, what will happen?
Endosmosis
Exosmosis
Deplasmolysis
No change
Mention two similarities between turgidity and flaccidity of a cell.
- The cell is likely to swell up
- The cell will stay the same size
- The cell will shrink
- None of the above
In brief, state what happens when
(a) Dry apricots are left for some time in pure water and later transferred to a sugar solution
(b) A red blood cell is kept in a concentrated saline solution?
(c) The plasma membrane of a cell breaks down?
(d) When Rheo leaves are boiled in water first and then a drop of sugar syrup is put on it,
(e) Golgi complex is removed
What are the different types of solutions with respect to water potential of cells ?
- Do not actively control the osmotic condition of their body fluid so are stenohaline
- Are also called euryhaline
- Do not change the body fluid according to the osmolarity of ambient medium
- Actively control the osmotic condition of their body fluid
In a plasmolysed cell, the space between cell membrane and plasma membrane is occupied by:
- Isotonic solution.
- Hypotonic solution.
- Air.
- Hypertonic solution.
- Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- Assertion is correct but Reason is incorrect
- Both Assertion and Reason are incorrect
What is Osmoregulation?
- Hypotonic
- Isotonic
- Hypertonic
- Either A or B
