Transport in Plants · Question 4

Which of the following is not observed during apoplastic pathway?

1. Movement of water occurs through intercellular spaces and wall of the cells
2. The movement does not involve crossing of cell membrane
3. The movement is aided by cytoplasmic streaming
4. Apoplast is continuous and does not provide any barrier to water movement

Addition of more solutes in a given solution will:

1. raise its water potential
2. lower its water potential
3. make its water potential zero
4. not affect the water potential at all

When a carrier protein facilitates the movement of two molecules across the membrane in same direction, it is called

1. Symport
2. Uniport
3. Transport
4. Antiport

The ascent of xylem sap in plants is mainly accomplished by the

1. root pressure
2. size of the stomatal aperture
3. distribution of stomata on the upper and lower epidermis
4. cohesion and adhesion between water molecules

Match List-I with List-II : Choose the correct answer from the options given below.

1. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
2. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is

1. Transpiration
2. Root pressure
3. Imbibition
4. Plasmolysis

What is the direction of movement of sugars in phloem?

1. Downward
2. Bi-directional
3. Non-multidirectional
4. Upward

Xylem translocates:

1. Water, mineral salts and some organic nitrogen only
2. Water, mineral salts, some organic nitrogen and hormones
3. Water only
4. Water and mineral salts only

Stomatal movement is not affected by

1. O2 concentration
2. temperature
3. CO2 concentration
4. light

The water potential of pure water is

1. less than zero
2. more than zero but less than one
3. more than one
4. zero