Transport in plants practice · Mixed difficulty

Transport of water and minerals in xylem is essentially

Some cells are placed in a solution of glucose to measure the rate of diffusion. As the concentration of glucose solution is being increased, the diffusion rate increases simultaneously. However, when the concentration of glucose solution reaches above 10 m, the diffusion rate no longer increases
Which statement best define the mechanism of glucoses transport in the cells?

Choose correct statements regarding the flow of sap in xylem?
I. Flow is driven by higher concentration of sugar in the vessel elements
II. Flow from root to twigs and leaves would be reduced if leaves are removed
III. In the morning, sap begins to flow first in the twig then in trunk
IV. Rapid flow of water put tissues under pressure much more than atmospheric pressure

As the solute concentration in a solution increases, the change that does not occurs is

In apoplast path way, water moves exclusively through the?

Force behind guttation

What are the location of casparian strips-which interrupts the movement of water inside a root?

In plants; which of the following are/is translocated through phloem?

Which of the following is not correct regarding carrier molecules, involved in facilitated diffusion?

If solute particles are added in pure water, its diffusion pressure will be

Consider the following statements and choose the correct answer from the options given below
I. A dry live seed still contains water
II. A mature maize plant absorbs about 3 L water per day
III. A mustard plant take up water equal to its weight in about five hours
IV. Water is not considered as the limiting factor for plant growth and productivity

The turgidity of guard cells is maintained by

The correct relationship among different type of soil water is

Cell wall present in water conducting tissues, represented by swollen nodules, is known as

A boy is studying transport of a certain type of molecules into cell. He finds that transport slows down when the cells are poisoned with a chemical that inhibits energy production. Under normal circumstances, the molecules studied by the boy is probably transported by.

Water will move from a region of higher water potential to a region of

Which one of the following denotes the water potential of the mesophyll cell in wilted condition?

Ascent of sap is

Select the correct events leading to the opening of the stomata. I.Decline in guard cell solutes.
II.Lowering of osmotic potential of guard cells. III.Rise in potassium levels in guard cells.
IV.Movement of water from neighbouring cells into guard cells. V.Guard cells becoming flaccid

A soil sample is found to have 25% of its volume occupied by soil water. Of this, 10% is hygroscopic water and the remaining is capillary water. What is the field capacity of this soil?

Three dicot leaves A, B and C are collected. Lower surface of A, upper surface of B and both surfaces of C are coated with was. Which wilt first?

Term osmosis is specifically used to refer

Among the following seeds and grains, which have more imbibing capacity?

I. Sorghum II. Cicer III. Pisum IV. Cajanus V. Paddy

Guttation is mainly due to

If a cell A with D.P.D. 4 bars is connected to cell B, C, D whose O.P. and T.P. are respectively 4 and 4, 10 and 5 and 7 and 3 bars, the flow of water will be:

Diffusion rates are affected by
I) Concentration gradient II) Temperature III) Pressure IV) Size of the substances

Ascent of sap in plants was demonstrated by

The most accepted theory for ascent of sap is?

When a cell is plasmolysed, it becomes

Diffusion pressure deficit is also called