Osmosis in selectively permeable membrane

Q.

Define the following: Tonicity

Q. how cell walls, permit the cell of fungi to withstand very dilute external media without bursting

Q.

"Cell wall permits the cells of plants fungi and bacteria to withstand very dilute external medium without bursting." Explain how.

Q. Akash is experimenting with different types of cells to know which cell can withstand the hypotonic solution without bursting. He takes a plant cell and an animal cell and keeps them in a hypotonic solution.

What are the observations by Akash?

1. No changes
2. Due to osmosis, the plant cell will burst.
3. Both the cells will shrink
4. Due to osmosis, the animal cell will burst.

Q.

A cell will swell up if:

1. The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium

2. The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell

3. The concentration of water molecules is same in the cell and in the surrounding medium

4. Concentration of water molecules does not matter

Q.

Give scientific reason for the following-

A. Inner membrane of Mitochondria is deeply folded

B. Skin of your finger shrink when you wash clothes for a long time

Q. Read the following statements and identify the process involved. Mark ‘O’ for Osmosis and ‘D’ for Diffusion.

A.Exchange of gases in roots
B.Raisin soaking up water
C.Absorption of minerals by roots
D.Smoke filling up a room

Choose the correct code for the above.

1. OODD
2. ODOD
3. DODO
4. DOOD

Q.

If vacuole prevent cell bursting then how plasmosis happen

Q. give 2 example of flaccid condition in plants

Q.

Plasmolysis occurs due to:

1. Osmosis

2. Absorption

3. Endosmosis

4. Exosmosis