Quiz On Transport in plant

Created on November 05, 2020 By

Emily Smith

Transport in plant

1 / 16

A semipermeable membrane allows entry of

solvent only

both solvent and solute

both solvent and selected solutes

selected solutes only

2 / 16

Read the given statements and select the correct option.
(i) In antiport method, both molecules cross the membrane in the same direction at the same time.
(ii) Aquaporins are membrane proteins which do not set up a concentration gradient.
(iii) Inactive transport the movable carrier proteins are called pumps.
(iv) Active transport and facilitated transport respond to protein inhibitors.

(i) and (iii) are correct

(ii), (iii) and (iv) are correct.

(i), (ii) and (iv) are correct

(i), (iii) and (iv) are correct.

3 / 16

Select the incorrect statement for the given figure

There is no net movement of water in cell B

Surrounding solution is hypertonic in case of cell A.

These experiments cannot be performed without involvement of porin proteins.

More solute is present inside the cell C as compared to the surrounding solution.

4 / 16

In case, the external water is pure, the diffusion pressure deficit (DPD) of a cell is represented by
(OP = Osmotic potential, WP = Wall pressure)

DPD = OP – WP

DPD = OP + WP

DPD = OP = WP

DPD = (OP1 – OP2) – WP

5 / 16

Sophia kept some freshly cut flowers in a solution of coloured dye. After some time she observed the coloured dye rising up in the flower. When the stem of the flower is held up in light, coloured strands are visible. Identify the components of xylem which is conducting coloured dye up the stem.

Tracheids

Vessels

Parenchyma

Both (a) and (b)

6 / 16

The cohesion force in xylem sap develops due to

hydrogen bonds between adjacent water molecules

high capillarity through tracheids

force between tracheid wall and water molecule

tension created by transpiration

7 / 16

Andy placed a crystal of CuSO4 in a beaker containing water. He observed an intense blue colour around the crystal. Blue colour decreases with the increase of distance from the crystal. Which phenomenon is taking place in this experiment?

Endosmosis

Diffusion

Active transport

Exosmosis

8 / 16

Read the following statements and select the correct one.

Sieve tube cytoplasm cannot tolerate high concentration of solute.

Tonoplast is present in sieve tubes

Sieve tube cells possess granules and filaments of P-protein with ATPase activity

Both (b) and (c).

9 / 16

Which of the following causes bleeding in plants?

Root pressure

Phloem pressure

Xylem pressure

All of these

10 / 16

Guard cells maintain their electroneutrality by

balancing K+ with malate and Cl–

combining with H+ to form malic acid

passing K+ inwardly

decreasing the pH of the cytoplasm.

11 / 16

Read the following statements and select the correct option stating which ones are true (T) and which ones are false (F).

(i) CO2, pH and hormones have no effect on transpiration.
(ii) Guard cells have ledges to prevent entry of water drops into stomata.
(iii) Glucose helps in decreasing the osmotic concentration of guard cells.
(iv) Red light has been found to be more effective than other wavelengths for opening of stomata.

T F T F

F F F T

F T F F

T T T F

12 / 16

Which of the following is not a function of turgor pressure?

It provides support to woody tissues like sclerenchyma.

It keeps cells and their organelles stretched.

It is essential in cell enlargement during growth.

It keeps the leaves fully expanded.

13 / 16

The number of stomata and epidermal cells in 1 mm2 leaf
area of lower epidermis of the leaves of A, B, C (plants) are
given below.
Arrange the plants in increasing order of their stomatal
index and choose the correct option.