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.
Fensom and Jones suggested which of the following method for translocation of solute?
Osmosis
Plasmolysis
Diffusion
Electrosmosis
Select the correct statement from the following
Only the net direction of osmosis, not the rate of osmosis depends on both the pressure gradient and concentration gradient
The rate of osmosis depends only on pressure gradient
The net direction and rate of osmosis depends upon both the pressure gradient and concentration gradient
The net direction and rate of osmosis do not depend on the pressure gradient and concentration gradient
Which one of the following doesn’t help in molecule transport?
Diffusion
Osmosis
Surface tension
Active transport
When the concentration of the soil solutes is low, the absorption of water
Remains normal
Is stopped
Is increased
Is decreased
If sugars are actively moving into a cell, what will happens to the turgor pressure of the cell?
TP increases, due to the entry of water
TP decreases because water exits
TP increases as sugar concentration affects it directly
No effect of sugar concentration of furgidity hence no change
Movement among cells against concentration gradient is called
Osmosis
Active transport
Diffusion
Passive transport
Which of them is/are correct regarding pressure flow model for translocation?
I. Sugar is transported through phloem as glucose
II. Movement of sugar is carried out through sieve tube near the source region
III. Concentration of sugar is always highest near the sink region
IV. Water from the adjacent xylem moves into phloem by osmosis
I and III only
II and IV only
I, II, and III only
II, III, and IV only
Transport of organic solutes is supposed to take place by pressure flow hypothesis through phloem tissue from source to sink. Choose the false statement about vascular tissue transport
Movement of water takes place through xylem along a gradient of water potential.
Phloem transports organic solutes from source to sink.
Active transport is involved in loading and unloading of organic solutes at source and sink respectively.
Xylem and phloem are living tissues.
A cell dipped in 0.5 M sucrose solution has no effect but when the same will be dipped in 0.5 M NaCl solution, the cell will
Increase in size
Decrease in size
Will be turgid
Will get deplasmolysed
