Turgid, Flaccid and Plasmolysed

Q.

(a) With the help of well-labelled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.
(b) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

Q. A plasmolysed cell can be deplasmolysed by placing it in

1. Saturated solution
   
2. Pure water or hypotonic solution
   
3. Hypertonic solution.
4. Isotonic solution
   

Q.

What are limiting, incipient, evident plasmolysis? Give differences between them. Explain

Q. Plasmolysis occurs when a plant cell is placed in:

1. hypertonic solution
2. Isotonic solution
3. hypotonic solution
4. None of these

Q. When a cell is placed in 0.5M concentrated sugar solution, there is no change in its volume. But the same cell is placed in 0.5M concentrated solution of sodium chloride there will be

1. decrease in volume
2. increase in volume
3. no change in volume
4. none of the above

Q. Cell turgidity is caused by

1. none of the above
2. endosmosis
3. exosmosis
4. plasmolysis

Q.

The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow:

(I) What is the state of the cell shown in the diagram?

(ii) Name the structure that acts as a selectively permeable membrane.

(iii) Label the parts numbered 1 to 4 in the diagram.

(iv) How can the above cell be brought back to its original condition? Mention the scientific term for the recovery of the cell.

Q. Arrange the following into its correct order of occurence.

i. plasmolysis
ii. movement of water out of cytoplasm
iii. shrinkage of protoplasm away from the cell wall
iv. movement of water out of vacuole
v. cell in hypertonic solution

1. v, ii, iv, iii, i
2. v, iv, ii, iii, i
3. v, iv, iii, ii, i
4. i, ii, iii, iv, v

Q. A cell is plasmolysed after being kept in a hypertonic solution. What will be the nature of the cell?

1. turgid
2. flaccid
3. None of the above
4. no change in cell nature

Q. A cell that is placed in a solution shrinks after some time. The solution is described as

1. isotonic
2. hypotonic
3. hypertonic
4. none of the above

Q. A cell kept in a hypertonic solution undergoes ________.

1. Imbibitions

2. Plasmolysis

3. Transpiration

4. Osmosis

Q. Fresh grapes will shrink when they are placed in

1. hot water
2. cold water
3. starch water
4. concentrated sugar solution

Q.

From the image below, determine the cell which is plasmolysed, the cell that is under normal condition and the turgid cell.

1. A- Turgid, B- Plasmolysed, C- Normal cell

2. A- Plasmolysed, B- Turgid, C- Normal cell

3. A- Plasmolysed, B- Normal Cell, C- Turgid

4. A- Normal cell, B- Turgid, C- Plasmolysed

Q. Differentiate between Plasmolysis and deplasmolysis.

Q.

Bacterial cells are often found in very hypotonic environments. Which of the following characteristics keeps them from continuing to take on water from their environment?

1. The presence of a cell wall allows a buildup of turgor pressure that prevents no more water from entering the cell.

2. The presence of a cell wall allows a buildup of tonic pressure that prevents any more water from entering the cell.

3. The cell expels water as fast as it takes it up.

4. None of the above.

Q. During plasmolysis, ________.

1. there is movement of water across the membrane from an area of higher water potential to lower water potential
2. there is movement of water across the membrane from an area of lower water potential to higher water potential
3. water moves inside the cell until equilibrium is reached
4. neither endosmosis nor exosmosis occurs

Q.

Who discovered plasmolysis?

Q. Which option shows correct pairs of Column - I and Column - II.

Column - I	Column - II
(i) Plasmolysis	(a) Phenomenon when a cell is placed in an isotonic solution
(ii) Cells turgidity	(b) Cytoplasm loses contact with the cell wall
(iii) Flaccid cell	(c) Phenomenon when a cell is placed in a hypotonic solution
(iv) Incipient plasmolysis	(d) Phenomenon when a turgid plant cell is placed in an hypertonic solution

1. i - d, ii - c, iii - a, iv - b
2. i - b, ii - d, iii - a, iv - c
3. i - d, ii - c, iii - b, iv - a
4. i - c, ii - a, iii - b, iv - d

Q. During plasmolysis, ________.

1. there is movement of water across the membrane from an area of higher water potential to lower water potential
2. there is movement of water across the membrane from an area of lower water potential to higher water potential
3. water moves inside the cell until equilibrium is reached
4. neither endosmosis nor exosmosis occurs

Q. Explain the biological principle involved in the storage of jams and pickles by adding excess sugar and salt, respectively.

Q. Which of the following pH values is responsible for the curd formation by Lactobacillus?
[1 mark]

1. Around 6.7
2. Around 8.7
3. Around 7
4. Around 4

Q. State whether the following statements are true or false.
A hypertonic solution has a water concentration greater than that is found inside the cell.

1. True
2. False

Q. What would be ${\Psi }_p$ of a flaccid cell?

Q. Salt is added to preserve meat, pickles, etc. because salting kills bacteria by the process of _______________.

1. Dissolution
2. Distillation
3. Imbibition
4. Plasmolysis

Q.

(a) With the help of well-labelled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.

(b) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

Q. A cell when dipped in 0.5 M sucrose solution has no effect but when the same cell is dipped in 0.5 M NaCl solution, it will

1. Increase in size
2. Decrease in size
3. Becomes turgid
4. Gets plasmolysed

Q. When a cell is plasmolysed, it becomes

1. Flaccid and its TP becomes zero
2. Turgid and its TP becomes zero
3. Turgid and TP becomes equal to OP
4. Flaccid and DPD becomes zero

Q. Due to plasmolysis, the plant cells

1. become turgid
2. become flaccid
3. burst
   
4. swell up

Q. Define the term plasmolysis.

Q. Movement of plant part in response to touch is

1. Seismonasty
2. Nutation
3. Thigmonasty
4. None of the above