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.
Imbibition is characterized by:
Decrease in volume of the imbibant
Increase in volume of the imbibant
No change in volume of the imbibant
Release of heat
Which force is primarily responsible for imbibition?
Gravitational forces
Cohesive forces
Adhesive forces
Osmotic pressure
Which of the following best describes osmosis?
Movement of water from a region of higher water potential to a region of lower water potential through a semi-permeable membrane
Movement of solute from a region of higher concentration to a region of lower concentration
Movement of water from a region of lower water potential to a region of higher water potential
Movement of any substance across a permeable membrane
What is the driving force for osmosis?
Difference in water potential
Difference in solute concentration
ATP hydrolysis
Temperature
Which of the following statements is INCORRECT regarding root pressure?
Root pressure is a positive hydrostatic pressure.
It is mainly responsible for the bulk flow of water in tall trees.
It is a pressure developed in the xylem of roots.
It is generally more effective at night or early morning.
Which process is directly responsible for creating the osmotic gradient that drives root pressure?
Passive diffusion of water into the xylem
Transpiration pull from the leaves
Photosynthesis in the leaves
Active transport of minerals into the xylem
The main difference between root pressure and transpiration pull is that:
Root pressure pushes water up the xylem, while transpiration pull pushes water down from the leaves.
Root pressure occurs only at night, while transpiration pull occurs only during the day.
Root pressure is active transport, while transpiration pull is passive transport.
Root pressure is a positive pressure generated in the roots, while transpiration pull is a negative pressure generated in the leaves.
Which of the following is NOT an example of diffusion?
The spread of perfume in a room
Movement of oxygen from lungs into the blood
Water being pumped up the stem of a plant
Spread of ink in a beaker of water
Which factor does NOT influence the rate of diffusion?
Temperature
Concentration gradient
Size of the particles
Amount of solvent
What happens to the rate of diffusion as temperature increases?
Decreases
Increases
Remains the same
Stops completely
