
In _____ pathway, water crosses at least two membranes for each cell in its path ( i.e., plasma membrane on entering and exiting).

Important Questions on Transport in Plants
List I |
List II |
A. Cohesion | I. More attraction in liquid phase |
B. Adhesion | II. Mutual attraction among water molecules |
C. Surface tension | III. Water loss in liquid phase |
D. Guttation | IV. Attraction towards polar surfaces |
Choose the correct answer from the options given below:




Identify the correct match of the type of water given in column-I and its character in column-II and select the correct option.
Column-I | Column-II | ||
(i) | Capillary water | (a) | present in the form of hydrated oxides of silicon and aluminium. |
(ii) | Hygroscopic water | (b) | goes down through large pores between soil particles and reaches the water table. |
(iii) | Combined water | (c) | held in between small non-colloidal soil particles. |
(iv) | Gravitational water | (d) | held tightly around soil particles by adhesive forces. |

Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:
Root hair, Endodermis, Epidermis, Xylem, Cortex.


Incoming sugars are actively transported out and removed as complex carbohydrates.
Increase of water potential.
Increase of hydrostatic pressure in sieve tubes.
Transport of water into sieve tubes by osmosis.

Match List - I with List - II.
List-I | List-II | ||
(a) | Cohesion | (i) | More attraction in liquid phase |
(b) | Adhesion | (ii) | Mutual attraction among water molecules |
(c) | Surface tension | (iii) | Water loss in liquid phase |
(d) | Guttation | (iv) | Attraction towards polar surfaces |

Assertion (A): In the apoplast pathway, water movement is ultimately symplastic in the endodermis
Reason (R): Root endodermal cells are suberized



A) Loading of sugars into phloem setup a water potential gradient that facilitates mass movement in phloem.
B) Sucrose moves into companion cell and then to phloem sieve tube cell by active transport.
C) A hypertonic condition in phloem facilitating water from the xylem into phloem by osmosis.
D) All sink sugars are transported out of the phloem producing high water potential with returning of water to xylem.
E) With increase in hydrostatic pressure in phloem pressure flow begin and sap moves through phloem.


In "Pressure Flow" hypothesis, sugars are transported from 'source' to 'sink'. The initial steps which occur during this physiological process are shown here.
I. In leaves glucose is converted to sucrose.
II. Sucrose moves from sieve tube cells to companion cells by active transport.
III. Loading of sucrose produces a hypotonic condition in the phloem.
IV. Water in the adjacent xylem moves into phloem by osmosis.
Identify the above correct statements:


Find correct statements from the following
Protein transporters are responsible for maximum rates of transport under saturated state
Translocation of substances in bulk flow requires hydrostatic pressure gradient
Root pressure plays the greatest contribution for upward movement of water in tall plants
Transport proteins of endodermal cells are control points for active transport of ions in two directions
The correct answer is




