Prepare for NEET Biology Transport in Plants with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to understand xylem, phloem, and movement of water.
Which of the following would have the LEAST effect on the rate of osmosis across a selectively permeable membrane?
The temperature of the solutions
The concentration gradient of the solute
The permeability of the membrane to the solute
The size of the solute molecules
Which characteristic distinguishes facilitated diffusion from simple diffusion across a biological membrane?
Movement down a concentration gradient
Specificity for the transported molecule
Passive transport requiring no energy input
Dependence on membrane fluidity
A mutation in an aquaporin gene results in a non-functional protein. Which of the following cellular processes would be MOST directly affected?
Glucose uptake by muscle cells
Sodium transport across nerve cell membranes
Water reabsorption in the kidneys
Calcium storage in the sarcoplasmic reticulum
Which of the following conditions would likely INHIBIT plasmolysis in a plant cell?
Increasing the concentration of solutes in the external solution.
Placing the cell in a hypertonic solution.
Placing the cell in a hypotonic solution.
Decreasing the cell's internal solute concentration.
During plasmolysis, the cell membrane separates from the cell wall. This separation is primarily due to:
The expansion of the cell wall due to increased turgor pressure.
The shrinking of the protoplast due to water loss.
The breakdown of the cell wall by hydrolytic enzymes.
The active transport of water out of the cell.
A plant cell with a water potential of -0.6 MPa is placed in a solution. After a period of time, the cell reaches equilibrium and is found to be plasmolyzed. Which of the following values could represent the water potential of the solution?
-0.4 MPa
-0.6 MPa
-0.8 MPa
-0.2 MPa
Which of the following is NOT a direct consequence of plasmolysis in plant cells?
Reduction in turgor pressure
Separation of the plasma membrane from the cell wall
Shrinkage of the protoplast
Lysis of the cell
The pressure required to prevent the swelling of a gelatine block when immersed in water is called:
Osmotic pressure
Turgor pressure
Wall pressure
Imbibition pressure
The heat released during imbibition is primarily due to:
Frictional forces between the imbibant and the liquid.
The release of latent heat of vaporization.
The establishment of hydrogen bonds between the imbibant and the imbibed liquid.
Metabolic activity within the imbibant.
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.
