Isotonic, hypotonic solutions, Hypertonic solutions

Q.

If you are provided with some vegetables to cook, you generally add salt to the vegetables during the cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?

Q.

Mention any two importance of turgidity in plants.

Q. Select the type of solution in which this plant cell is immersed?

1. Hypertonic
2. Hypotonic
3. Isotonic
4. No external media

Q.

When are cells said to be plasmolysed?

Q.

Define the following terms:

(a) Exosmosis

Q.

Name the process/term for the statements given below:

1. A solution whose concentration is equal to that of the cell sap.
2. A solution whose concentration is greater than that of cell sap.
3. A solution whose concentration is lower than that of cell sap.
4. Two solutions having equal osmotic pressure.

Q.

Change of flaccid cell into turgid cell.

Q.

Assertion (A): Plant cell does not burst when placed in hypotonic condition.
Reason (R): Cell wall withstands the internal pressure of the swollen cell.

1. Both (A) and (R) are correct.
2. (A) is incorrect but (R) is correct.
3. (A) is correct but (R) is incorrect.
4. Both (A) and (R) are incorrect.

Q. The plasma membrane is an SPM, then how in the space between cell wall and protoplast in plasmolysed cell, hypertonic solution present.

Q. If an animal cell is placed into a solution whose concentration of dissolved substances is higher than that inside the cell -

1. The cell will swell
2. The cell will shrivel
3. The solution is described as hypertonic
4. Both (b) and (c) are correct

Q. If an animal cell is kept in a solution containing high concentration of salt or sugar. What changes will you observe in the cell:

1. Cell shrinks
2. Cell bursts
3. Cell swells up
4. Remains same

Q. If a cell shrinks when placed in a solution, what will be the tonicity of the solution when compared to cell solution?

1. Hypotonic
2. Isotonic
3. Hypertonic
4. Cannot determine

Q.

What is plasmolysis?

1. Multiplication of cell

2. Contraction of cell protoplast

3. Expansion of cell protoplast

4. Cell death

Q. Lysosomes are membrane-bound sacs filled with ___.

1. digestive enzymes
2. lipids
3. DNA
4. protiens

Q.

The figure given below shows the epidermal cells of an onion bulb. This cell was then transferred to a drop of sugar solution.

(i) Draw a well-labelled diagram of the epidermal cell as it would appear after immersion in a strong sugar solution.

(ii) What scientific term is used for the changes as shown in (i)?

(iii) What should be done to restore the cell back to its original condition?

(iv) Give the scientific term for the recovery of the cell as a result of the step taken in (iii) above.