Read the following statement and choose the correct one from the codes given below
I. The apoplastic movement of water takes place exclusively through intercellular spaces and cell wall without crossing any membrane
II. Symplastic movement occurs from cell to cell through plasmodesmata, ., adjacent cells are connected through plasmodesmata
III. Permeability of a membrane depends on its composition and chemical nature of the solute
IV. Solutes present in a cell increases the free energy of the water or water potential
I, II and III
I, II and IV
II and IV
I and IV
Related Questions
Water occur freely in previous rocks and deep in soil above the impermeable strata is
Ground water
Soil water
Deep stratum water
Hygroscopic water
The Casparian strip in the endodermis plays a crucial role in water absorption by:
Increasing the surface area for water absorption.
Preventing water loss from the cortex back to the soil.
Actively transporting water into the xylem.
Forcing water to enter the symplast, allowing for selective uptake of minerals.
Select the incorrect statement w.r.t. apoplast pathway of absorption of water in plants.
It consists of living parts of plant body
There is a little resistance in the movement of water
It is faster
It is not affected by metabolic state of root
Identify true and false statements and select the correct option from the codes given below
I. As suction pressure increases, water absorption also increases which in turn increases the absorption of ions
II. Absorption of ions is affected by transpiration pull
III. Large amount of charged particles are absorbed along with absorption of water
IV. Pressure flow hypothesis depends entirely on the existence of mechanism for loading sugars into phloem at the source region and unloading it at the sink
V. Contents in the sieve tube move undirectionally
I, II, III and IV are true while V as false
I, III, IV and are true while II is false
I, II, IV and V are true while III is false
II, III, IV and V are true while I is false
How would you differentiate between apoplast and symplast?
The apoplast is the continuous space outside the plasma membrane, while the symplast consists of the interconnected cytoplasm of adjacent cells.
Both apoplast and symplast are pathways for intracellular transport, but the apoplast uses vesicles while the symplast relies on diffusion.
The apoplast is the network of interconnected plasmodesmata, while the symplast refers to the cell walls and intercellular spaces.
The apoplast and symplast are both located within the cell cytoplasm, but the apoplast is specifically associated with the endoplasmic reticulum.
A researcher observes that water absorption by roots is significantly reduced when the plant is treated with a respiratory inhibitor. Which of the following best explains this observation?
Respiratory inhibitors directly block aquaporin function, preventing water movement.
Respiration is essential for maintaining root cell turgidity, which is directly linked to water absorption.
Active transport of ions into the root cells requires energy, creating a water potential gradient that drives water uptake.
Inhibition of respiration disrupts the cohesion-tension theory, preventing water movement through the xylem.
Root endodermis has the ability to actively transport ions …A… because of …B… . Choose the correct pair
into the xylem; presence of Casparian strip
into the cortex; presence of Casparian strip
into the cortex; absence of Casparian strip
into the xylem; absence of Casparian strip
Ascent of sap is
Active and requires energy expenditure by the soil
Passive, and no requirement of energy by the plants
Active and requires energy expenditure by the plants
Passive unless soil is dry
Which of the following is NOT a major pathway for water movement in the roots?
Apoplast pathway
Symplast pathway
Transmembrane pathway
Transpiration pull
Why all the minerals present in soil can not be passively absorbed by roots?
Mineral existence as ions is more than absorption
Due to less concentration of ion in root interior than soil
Due to more concentration of ions in root interior than in soil
None of the above
