MCQ ON OSMOSIS class 11for NEET | OSMOSIS class 11 | MCQ OSMOSIS with Answer | Check the below NCERT MCQ question for class 11 Biology based on the with Answers.
MCQ on OSMOSIS class 11 Biology with answers were prepared based on the latest pattern. We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.
MCQ ON OSMOSIS class 11for NEET
MCQ ON OSMOSIS is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2022-2023,2024
INTRODUCTION:-
Osmosis :-
The plant cell is surrounded by a cell membrane in a cell wall. The cell wall is freely permeable to water and substances in solution hence is not a barrier to movement.
In plants the sales usually contain a large central vacuole whose contents the vacuolar sap , contribute to the solute potential of a cell.
In plant cell the cell membrane and the membrane of the vehicle the tonoplast together important determinants of movement of molecules in or out of the cell.
Osmosis is the term is to refer specifically to the diffusion of water across a differentially or semipermeable membrane. Osmosis occurs spontaneously In response to a driving force. The net direction and rate of osmosis depends on the boards the pressure gradient and concentration gradient.
Water will move from it’s reason of higher chemical potential or concentration to its region of lower chemical potential until equilibrium is reached. At equilibrium the two chambers should have the same water potential.
Lat us discuss experiment where a solution of sucrose in water taken in a funnel is separated from pure water in a beaker through a semi permeable membrane.
You can get this kind of a membrane in an egg.
Remove the yolk and albumin through a small hole at one end of the egg and place of the shell in dilute solution of hydrochloride acid for a few hours.
The egg shell dissolves leaving the membrane intact.This will continue till the equilibrium is reached.
In case sucrose does diffuse out through the membrane , will this equilibrium be ever reached.
External pressure can be applied from the upper part of the funnel through the membrane.This pressure required to prevent water from diffusing is in fact, the osmotic pressure and this is the function of the solute concentration , more the solute concentration , greater will be the pressure to prevent water from diffusing in.
Numerically osmotic pressure is equivalent to the osmotic potential , but the sign is opposite . Osmotic pressure is the positive pressure applied while osmotic potential is negative.
MCQ THE OSMOSIS class 12 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2022-2023,2024
1.The net diffusion of water molecules from a dilute solution to the concentrated solution when the two are separated by means of a semi-permeable membrane is called.
(a) Diffusion
(b) Osmosis
(c) Hypotonic solution
(d) Hypertonic solution
Ans (b) Osmosis
2. A solutions having a concentration such that it gains water or solvent by Osmosis across a semi-permeable membrane from some other specified solution.
(a) hypertonic solution
(b) hypotonic solution
(c) isotonic solution
(d) osmosis
Ans. (a) hypertonic solution
3. A solution having a concentration such that it loses water solvent by Osmosis across a semi permeable membrane to some other specific solution
(a) hypertonic solution
(b) hypotonic solution
(c) isotonic solution
(d) all the above
Ans. (b) hypotonic solution
4. A solution having concentration such that it neither gains not loses water by osmosis when separated by a semi permeable membrane from a specified solution
(a) Hypertonic solution
(b) Hypotonic solution
(c) Isotonic solution
(d) none of these
Ans.(c) Isotonic solution
5. The water molecules enter into the cell sap as a result of simple process of osmosis this is known as
(a) endosmosis
(b) exosmosis
(c) isotonic
(d) all the above
Ans.(a) endosmosis
6. If the direction of movement is reverse from cell sap to outside, the Osmosis is termed as
(a) exosmosis
(b) endosmosis
(c) both a and b
(d) none of these
Ans.(a) exosmosis
7. The maximum amount of pressure that can be developed in a solution separated from pure water by semi permeable membrane is known as
(a) osmotic pressure
(b) diffusion pressure
(c) turgor pressure
(d) exosmosis
Ans.(a) osmotic pressure
8. Importance of osmosis in plants are
(a) cell to cell moment of water
(b) leaves become turgid
(c) the resistance of plants to drought
(d) all the above
Ans.(d) All the above
9. Opening and closing of stomata is affected by
(a) diffusion
(b) osmosis
(c) turgor pressure
(d) diffusion pressure deficit
Ans. (b) Osmosis
10. Under given suitable condition the DPD will be more than OP
(a) When OP is equal to TP
(b) When OP is less than TP
(c) When OP is greater than TP
(d) When TP is negative
Ans. (d) When TP is negative
11. When water inter into root hairs from soil on account of
(a) Turgor pressure
(b) Osmotic pressure
(c) Suction pressure
(d) Root pressure
Ans.(c) Suction pressure
12. The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as
a) Osmosis
b) Active absorption
c) Passive absorption
(d) Inhibition
Ans . (b) Active absorption
13. Isotonic solution have
(a) Same diffusion pressure
(b) Same osmotic pressure
(c) Same density
(d) Same concentration
Ans.(b) Same osmotic pressure
14.Active K+ exchange mechanism for the opening and closing of stomata was given by
(a) Devlin
(b) Levitt
(c) Seath
(d) Khorana
Ans. (b) Levitt
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15. What will occur when a cell is kept in hypotonic solution after treating with alcohol ?
(a) it will shrink and die
(b) it will swell
(c) it will shrink
(d) there will be no change.
Ans.(d) there will be no change
16.Plants cell submerged in distilled water will become
(a) turgid
(b) flacid
(c) plamolysed
(d) impermeable
Ans.(a) turgid
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