Prepare for NEET Biology Transport in Plants (Imbibition) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert insights to study absorption of water by dry seeds and other substances.
A dry wooden block and a dry gelatine block of equal mass are placed in water. The gelatine block imbibes considerably more water than the wooden block. This difference is primarily attributed to:
The higher density of wood compared to gelatine.
The greater number of hydrophilic colloids in gelatine compared to wood.
The presence of lignin in wood, which repels water.
The lower osmotic potential of gelatine compared to wood.
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
Which of the following factors DOES NOT significantly affect the rate of imbibition?
Temperature
Affinity of the imbibant for the liquid
Surface area of the imbibant
External hydrostatic 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.
Seeds of certain desert plants exhibit delayed germination due to the presence of inhibitors. How does imbibition contribute to overcoming this dormancy?
Imbibition increases the seed's internal temperature, denaturing the inhibitors.
Imbibition activates enzymes within the seed that break down the inhibitors.
Imbibition allows water to enter the seed and leach out the inhibitors, promoting germination.
Imbibition increases the seed's turgor pressure, rupturing the seed coat and releasing the inhibitors.
If dry wooden blocks are placed in a solution with a solute potential of -0.5 MPa, and the initial water potential of the wood is -2.0 MPa, which of the following will occur?
Water will move from the solution into the wooden blocks.
Water will move from the wooden blocks into the solution.
No net movement of water will occur.
The wooden blocks will dissolve in the solution.
Which of the following is NOT a characteristic of imbibition?
Presence of a water potential gradient
Affinity between the adsorbant and the liquid
Increase in volume
Decrease in volume
The pressure that develops in the xylem during imbibition of water by seeds is primarily responsible for which of the following?
Transpiration pull
Root pressure
Breaking open the testa
Guttation
Which of the following substances would likely exhibit the highest imbibition capacity?
Proteins
Starch
Cellulose
Suberin
Imbibition plays a crucial role in the initial stages of water absorption by which plant structure?
Xylem vessels
Phloem sieve tubes
Root hairs
Stomata
