Apply concept of water potential and osmosis

The pressure applied in this experiment is

  • Hydrostatic Pressure

  • Colloidal pressure

  • Osmotic pressure

  • Pressure potential

Osmotic pressure is a function of

  • Osmotic potential

  • Solute concentration

  • Solvent amount

  • Water potential

Osmotic pressure is the

  • Pressure required to stop the water diffusing in

  • Function of solute concentration

  • More the solute, more is the pressure needed to stop endosmosis

  • All of these

Numerically osmotic pressure is equal to  the

  • Osmotic potential

  • Solute potential

  • Both A and B but sign is opposite

  • Pressure potential

Isotonic solution is

  • A solution which is more concentrated than the cytoplasm

  • A solution which is more dilute than the cytoplasm

  • A solution which balances the osmotic pressure of the cytoplasm

  • A solution which is less dilute than the cytoplasm

Hypotonic solution is

  • solution which is more concentrated than the cytoplasm

  • A solution which is more dilute than the cytoplasm

  • A solution which balances the osmotic pressure of the cytoplasm

  • A solution which is less dilute than the cytoplasm

Hypertonic solution is

  • solution which is more concentrated than the cytoplasm

  • A solution which is more dilute than the cytoplasm

  • A solution which balances the osmotic pressure of the cytoplasm

  • A solution which is equal to that of cytoplasm in terms of concentration

Plasmolysis

Which one is incorrect.

  • External solution is hypertonic

  • Water moves out of the cell

  • Cell membrane shrinks away from it's cell wall

  • Firstly cell sap comes out then cytoplasmic water.

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

  • Hypertonic solution

  • Hypotonic solution

  • Water

  • Cytoplasmic content

Plasmolysis is

  • Usually reversible

  • Occurs when cell is placed in hypotonic external solution

  • Shrinkage of cytoplast

  • All of these

When the cells are placed in a hypotonic solution water movement causes

  • Osmotic pressure

  • Turgor pressure

  • Hydrostatic pressure

  • Hydrodynamic pressure

Turgor pressure causes

  • Rupture of animal cell

  • Responsible for enlargement and extension of plant cell

  • Pressure against the wall

  • All of these

Imbibition

Find the incorrect one.

  • A special type of diffusion

  • Water is absorbed by solids-colloids

  • Causing the increase in volume

  • Absorption of water by seeds, dry wood and cell

Prehistoric man used which of the following methods to split rocks and boulders?

  • Plasmolysis

  • Active Transport

  • Osmosis

  • Imbibition

Emergence of seedling is due to

  • Plasmolysis

  • Active Transport

  • Osmosis

  • Imbibition

In germination of seed, what is absorbent?

  • Seed

  • Water

  • Environment

  • Seedling

During Imbibition which of the following is pre-requisite?

  • Water potential gradient between the absorbent and the liquid imbibed

  • Affinity between absorbent / adsorbent

  • Amount of seeds

  • Both A and B

From the twig experiment in which twig is placed in colored water, which of the following can be deduced?

  • The path of organic Acid

  • The path of hormones

  • The path of water

  • The development of twig

Long distance transport cannot be carried by

  • Diffusion Alone

  • Active transport alone

  • Bulk flow

  • Both A and B

Movement of molecule across a typical plant cell i.e. 50 micrometer takes

  • 10 seconds

  • 15 seconds

  • 2.5 seconds

  • 16 seconds

Mass flow or bulk flow system is the movement of substances in bulk or in masse from one point to another point as a result of

  • Pressure Difference between two points

  • Osmotic gradient between two points

  • Concentration gradient between two points

  • Cannot be predicted

Mass flow

  • Solids move slowly

  • Liquid move faster

  • All move through the same pace

  • Solids move faster due to high Osmotic pressure

Bulk flow can be achieved by

  • Positive hydrostatic pressure

  • Negative hydrostatic pressure

  • Both A and B

  • Concentration gradient

If mass flow is occurring like a garden hose,

  • It is due to positive hydrostatic pressure

  • It is due to negative hydrostatic pressure

  • It is due to concentration gradient

  • All of these

If mass flow is occurring like suction through a straw

  • It is due to positive hydrostatic pressure

  • It is due to negative hydrostatic pressure

  • It is due to concentration gradient

  • All of these

The apoplast does not hold true which of the following statements?

  • System of adjacent cell walls that is continuous throughout the plant

  • Not continuous path at the place of casparian strips of the endodermis in the roots

  • Occurs through the intercellular spaces and the walls of the cells

  • Crosses cell membrane

Apoplast movement

Find the wrong one.

  • Dependent on gradient

  • Water movement is through mass flow

  • The continuous stream of water gets tension when water is absorbed by root hairs

  • Mass flow of water occurs due to adhesive and cohesive properties of water

Symplastic system

Find the wrong one.

  • System of interconnected protoplasts

  • Involves path through plasmodesmata

  • Water has to enter the cells through the cell membrane

  • Above a potential gradient movement

Symplastic movement is slower than apoplastic movement

  • Because it involves cytoplasmic streaming always

  • Molecule has to enter through the cell membrane

  • Because it is down the gradient

  • All of these

Most of the water flow in the roots occur via the………

  • Apoplast

  • Symplast

  • Active transport

  • Imbibition

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