Osmotic relations of plant cells - class-XII
Description: osmotic relations of plant cells | |
Number of Questions: 71 | |
Created by: Rekha Rai | |
Tags: biology botany bio-chemistry cell membrane plant physiology transport in plants absorption by roots - the processes involved |
Which of the following statements is not correct?
Passage of cell contents out of the cell. Water potential can be calculated as :
$2\%$ NaCl as compared to $18\%$ glucose solution is
When the cell is placed in water, it takes water this is due to?
Red blood cells when placed in a hypotonic solution will ______.This process is known as ______.
The value of $2, 4$-D is $25$ ppm. How many amount of $2, 4$-D should require for making its $5$ litres, $15$ litres and $25$ litres solutions respectively.
Plant cells do not burst in distilled water, because
When a grape is placed in concentrated sugar solution, then it will show
A cell is plasmolysed after being kept in a hypertonic solution. What will be present between the cell wall and plasmalemma?
Which bacterium causes cotton destruction
Which one of the following is the most suitable medium for culture of Drosophila melanogaster ?
Osmotic pressure is higher in _______________.
OP of a solution can be measured by
A higher plant cell covered with cutin and suberin is placed in water. After 15 minutes the cell
In a plant cell, O.P. is equal to
Mango dipped in concentrated NaCl solution will
Movement of water through semipermeable membrane produces
The cell becomes turgid in solution which is
Water will enter a cell, if it is placed in solution less concentrated than cell sap due to
Glucose is not stored in plants due to its ability to
The space between plasma membrane and cell wall of a plasmolysed cell surrounded by a hypertonic solution is occupied by
2% NaCl as compared to 18% glucose solution is
Osmotic pressure of pure water is
Choose the wrong statement.
Osmotic pressure of a cell kept in water is chiefly regulated by
RBC placed in distilled water will
Flaccid cell means
The osmotic pressures of $0.1$ glucose and $0.1$M sucrose solutions are the same because ______________________.
In plant cells, which of the following are important determinants of movement of molecules in or out of the cell?
When a plasmolysed cell is placed in a hypotonic solution then water will move inside the cell this will happen due to which force
When a plasmolysed cell is placed in a hypotonic solution then water will move inside the cell. Which force causes this?
Which of the following statements is correct?
Which of the following statements does not apply to reverse osmosis?
The concentration of solute in four cells is $0.4\,M$. They are placed in four separate containers I, II, III and IV, filled with saline water of concentration $0.1\,M$, $0.4\,M$, $2\,M$ and $3\,M$ respectively. In which container will the cell swell?
The maximum pressure developed in a solution when separated from pure water by a semipermeable membrane is called
A plant cell placed in pure water will
If a red blood cell (interior concentration of 0.9% salt) was placed into a test tube of 10% salt, what would happen to the red blood cell?
What will happen if a plant and animal cell is put in a hypotonic solution?
What will be observed when a plant or animal cell is put in a hypertonic solution?
If cells of onion peel and RBC are separately kept in hypotonic solution, what among the following will take place?
Mammalian liver cells will swell, if they are kept in
Grapes were put in a concentrated sugar solution. On examination after 12 hours, the grapes were shrunken. This is because
When amoeba is placed in a hypertonic medium, it shrinks. Why does this happen?
A single-celled organism which has contractile vacuole to move water from inside to outside of the cell was studied in an experiment in which the organism was placed in water with different salt concentrations. The rate at which the contractile vacuole contracted to pump out excess water was recorded.
Salt conc. | Rate of contractile vacuole contractions per minute |
---|---|
Very high | 2 |
High | 8 |
Medium | 15 |
Low | 22 |
Very Low | 30 |
Which of the following explains the observed relationship between the rate of contractile vacuole contraction and the salt concentration?
All of the following involves osmosis except
OP of a cell can be measured by
In root hair, water enters due to
A cell with DPD = 5 is surrounded by A, B, C and D cells having O.P. and T.P. 5 and 4, 7 and 5, 3 and 2, zero and zero respectively. From which cell will the water withdraw faster?
Colligative property is :
1. Osmotic pressure
2. Vapour pressure
3. Cohesive force
4. Surface tension
A RBC and a plant cell having same O.P. are placed in distilled water, then
If cells of onion peel and RBC are separately kept in hypotonic solution, what among the following will take place?
Cells of onion peel and RBC are separately kept in hypotonic solution, what among the following will take place?
What will happen when a Red Blood Cell (RBC) is kept in concentrated saline solution?
Choose the correct answers from the alternatives given :
The relationship between osmotic pressure, turgor pressure and wall pressure is represented by
Most common type of absorbent for $H _{2}S$ removal is
According to fluid mosaic model (proposed by Singer and Nicolson), plasma membrane is composed of
The cell membrane engulfs its food by a process called as
Water uptake in Imbibition takes place through ________
Imbibition occurs due to?
Which of the following statements is correct?
The principle used in pickling is
Absorption of water from soil by seeds increases the _________ thus helping seedlings to come out of soil.
The practice of breaking of rocks during rainy season by inserting wooden pegs in them is based on the phenomenon of ______________.
Movement of solvent molecule from a region of its higher concentration to a region of its lower concentration through a semi-permeable membrane, is referred to as.
Choose the correct answers from the alternatives given.
The first process by which water enters into the seed coat when a seed is placed in a suitable situation for germination is
The uniformly sweet taste of coffee or tea is due to
Read the given statements and select the correct ones.
(i) A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable.
(ii) A membrane which allows some substances to pass through it more readily than others is known as selectively/differentially permeable.
(iii) All living biological membranes are perfectly semipermeable.
Essence of environmental sciences involve:
Monovalents like $Na^+$, $K^+$ .......... membrane permeability, while divalents like $Ca^{2+}$ .......... the same.
A semi-permeable membrane allows larger molecules to pass through but prevents the smaller ones.
Term plasmodesmata was first used by