Osmosis

Q.

Write four differences between plasma membrane and cell wall.

Q.

What will happen if a de-shelled egg in a concentrated salt solution for 5 minutes?

Q.

Two beakers A and B contain plain water and concentrated sugar solution respectively. Equal number of dried raisins are kept in them for some time and then taken out.

a. Explain the reason for the difference in their physical appearance.

b. Categorise the two solutions as Hypotonic and Hypersonic.

Q.

What will happen if a cell is kept in hypertonic solution for a long time?

1. Swells up

2. Show plasmolysis

3. Shrinks

4. No change in shape

Q.

What will happen if an animal cell is kept inside distilled water for 24 hours?

Q.

Difference between plasma membrane and cell wall?

Q.

Define the term plasmosis and deplasmosis

Q.

What will happen if plant cell is kept in isotonic solution

Q.

What are aquaporins

Q. Consider a cell put in a salt solution. There is more salt in the cell than in the solution (/it's environment), but there is more water in the solution than inside the cell. Which direction will the water go?? Or is there any movement at all?? Will the cell remain the same size/shrink/no change in shape???

Q.

What type of transport protein is an aquaporin?

Q.

What is osmosis?

Q.

Plasmolysis occurs due to:-

1. Absorption

2. Exosmosis

3. Endosmosis

4. Diffusion

Q. Keeping in view the “fluid mosaic model” for the structure of the cell membrane, which of the following statement is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

1. Both lipids and proteins can flip flop
2. Neither lipids nor proteins can flip flop
3. While lipids can rarely flip flop, proteins cannot
4. While proteins can flip flop, lipids cannot

Q.

What will happen to the grapes if they are kept in honey?

1. They will shrink.

2. They will burst.

3. They will swell up.

4. They will remain the same.

Q.

Raisins and apricots are plant cells but they swell and shrink when they are put in hypertonic and hypotonic.How does this happen ?

Q.

what will be the effect of hypotonic and hypertonic salt solutions on human RBCs

Q.

What will happen if we put an animal cell into a sugar or salt solution?

1. Cell shrinks

2. Cell swell
3. Cell burst
4. None of these

Q.

Movement of water molecules along their concentration gradient through a selectively permeable membrane is known as

1. Plasmolysis

2. Osmosis

3. Hydrophosis

4. Diffusion

Q. What are the consequences of the following conditions below?

(a) A cell containing higher water concentration than the surrounding medium

(b) A cell having low water concentration than the surrounding medium.

(c) A cell having equal water concentration to its surrounding medium.

Q.

Place a de-shelled egg in water for five minutes. What do you observe?
In the above light , state the conditions for osmosis? [ 5 MARKS]

Q.

In brief state what happens when-

A. Red blood cell is kept in concentrated saline solution.

B. Cells of onion peel are kept in hypotonic solution.

Q. What will happen if a de-shelled egg is kept in a concentrated salt solution for 5 minutes?

Q.

what is semi permeable membrane and how is it helpful in the process of osmosis?

Q.

Plasmolysis is the process in which cells lose water in a

1. Plasmolysis

2. Apoptosis

3. Osmolysis

4. Cell wall lysis

Q. The process in which water molecules leave the cell is called

1. Endosmosis
2. Exosmosis
3. Diffusion
4. Plasmolysis

Q. What will happen when we dip an animal cell in a hypertonic solution

Q. The solution which has higher solute concentration than the cell is called

विलयन जिसकी विलेय सांद्रता कोशिका की विलेय सांद्रता से अधिक होती है, उसे क्या कहते हैं?

1. Safranin solution
   सैफ्रानिन विलयन
2. Isotonic solution
   समपरासारी विलयन
3. Hypotonic solution
   अल्पपरासरी विलयन
4. Hypertonic solution
   अतिपरासरी विलयन

Q.

Which of the following statement(s) regarding cell membrane are true and which are false :

I.It is present in both animal and plant cells.

II.It is made of the lipid bilayer.

III.It has both intrinsic and extrinsic proteins.

IV.Carbohydrates are absent.

1. I. T, II. T, III.T, IV.F

2. I. T, II. T, III.T, IV.T

3. I. F, II. T, III.T, IV.T

4. I. F, II. F, III.F, IV.F

Q. Diffusion of water across a semi-permeable membrane from an area of its high concentration to an area of its low concentration, defines which of the following process?

1. Osmosis
2. Hypertonic
3. Concentration gradient
4. Diffusion