Osmosis

Q.

What is plasmolysis and give an example?

Q.

What occupies the space between the cell wall and the shrunken protoplast in the plasmolysed cell?

Q.

A person takes concentrated solution of salt, after sometime, he starts vomiting. What is the phenomenon responsible for such situation? Explain.

Q. Which of the following processes does not require energy?

1. All of the above
2. Passive transport
3. Diffusion
4. Osmosis

Q. The membrane that allows some of the molecules to pass through it and prevent the others is called

1. permeable membrane
2. semipermeable membrane
3. selectively or differentially permeable membrane
4. impermeable membrane

Q. How do substances like carbon dioxide $\left(C{O}_2\right)$ and water $\left(H_{2}O\right)$ move in and out of the cell?

Q. What will happen to isolated RBC cells placed in distilled water?

1. Cells will burst.
2. Cells will shrink.
3. Cells will swell up only.
4. Cells shape will remain normal.

Q. Define permeability, semi permeability and impermeability. Give one example for each.

Q.

The oxidative phosphorylation is

1. Addition of phosphate group in ATP

2. Formation of ATP by energy released from electrons removed during substrate oxidation

3. Formation of transfer of phosphate group from a substrate to ADP

4. Oxidation of phosphate group in ATP

Q.

Plasmolysis in a plant cell is defined as

1. Break down (lysis ) of plasma membrane in hypotonic medium

2. Shrinkage of cytoplasm in hypertonic medium

3. Shrinkage of nucleoplasm

4. None of them

Q.

Product of sexual reproduction generally generates

1. large biomass

2. new genetic combination leading to variation

3. prolonged dormancy

4. longer viability of seeds

Q.

Given below is a diagram of the cell as seen under the microscope after having been placed in a solution.

(i) What is the technical term used for the state/condition of the cell shown above?

(ii) Give the technical term for the solution in which the cell was placed.

(iii) Name the parts numbered 1 to 4.

(iv) Is the cell given above a plant cell or an animal cell? Give two reasons in support of your answer as evident from the diagram.

(v) What would you do to bring this cell back to its original condition?

Q.

What happens to cells if they lose too much water?

Q.

What is the movement of water through a semipermeable membrane called?

Q.

How is flaccidity structurally seen in plants?

Q.

Differentiate between the following:

(a) Diffusion and Osmosis

(b) Transpiration and Evaporation

(c) Osmotic Pressure and Osmotic Potential

(d) Imbibition and Diffusion

(e) Apoplast and Symplast pathways of movement of water in plants.

(f) Guttation and Transpiration.

Q.

Difference between chemiosmosis and electron transport chain.

Q.

What are the 3 types of cell transport?

Q. In submerged hydrophytes, the functional stomata are found:

1. On the upper leaf surface
2. On the lower leaf surface
3. Both leaf surface
4. No where on the plant

Q.

Give reason for the following:

The leaves of certain plants roll up on a bright sunny day.

Q. If some solute is dissolved in pure $H_{2}O$, the solution has less free $H_{2}O$ and concentration of $H_{2}O$ decreases, increasing its:

1. Osmotic pressure
2. Solute concentration
3. DPD
4. All of the above

Q. Why does the skin of your finger shrink, when you wash clothes for a long time?

1. Soap is hypertonic, so water is moved out of finger by osmosis.
2. Soap is hypotonic, so water is moved out of finger by osmosis.
3. Soap is isotonic, so water is moved into finger by osmosis.
4. Finger skin is very tender.

Q. Variation, a part of genetics, means the degree by which progeny differ from their parents. One of the causes of variation is hidden in _______.

1. asexual reproduction
2. parthenogenesis
3. vegetative propagation
4. sexual reproduction

Q. Study the experiment shown below :

After few days, which of the following will have occurred?

1. A rise in level X and Y
2. A drop in level X and level Y
3. A rise in level X and a drop in level Y
4. A drop in level X and a rise in level Y

Q. The following paragraph is related to absorption of water from the soil. Complete the following paragraph by selecting the correct word from those in the box. You may use the term only once.

exosmosis, hypertonic, osmosis, isotonic, hypotonic, cortical, endosmosis

Water enters the root hair from the soil by the process of . This is because the solution in the soil is , whereas the cell sap in the root hair cell is . The water then passes through the cells by cell to cell and reaches the xylem of the root.

Q.

Glucose is taken back from glomerular filtrate through_________

Q.

The condition of a cell in which the cell contents are shrunken

Q. What are the types of osmosis?

1. Endosmosis
2. Exosmosis
   
3. Both A and B
4. None of these

Q. What is the difference between osmosis and reverse osmosis?

Q. Exchange of substances between a cell and its environment can occur through

1. diffusion
2. active transport
3. all of the above
4. osmosis