Transport in Plants

If a cell A with DPD = 5 bars is connected to cells B, C and D, whose OP and TP are respectively 5 and 5, 10 and 4, and 8 and 3, the flow of water will be

• C to A, B and D

• A and D to B and C

• A to B, C and D

• B to A, C and D

Read the following statements and select the correct option.

Statement 1: Plasmolysis is bursting of cell membrane when a cell is kept in a hypertonic Solution

Statement 2: hypertonic solution causes endosmosis.

• Both statements 1 and 2 are correct.

• Statement 1 is correct but statement 2 is incorrect.

• Statement 1 is incorrect but statement 2 is correct.

• Both statements 1 and 2 are incorrect

Which of the following transport mechanisms shows saturation of transport but does not show uphill transport?

• Simple diffusion

• Active transport

• Facilitated diffusion

• Both simple and facilitated diffusion

Depict the flow of water molecules by referring to the image given below.

• From A to B

• From B to A

• No net movement of water

• Data inadequate

Which of the following statement is correct regarding root pressure?

• Majority of water transport to fulfil needs of a plant is accomplished by root pressure.

• Effect of root pressure is observed at night and early morning when evaporation is low.

• It maintains the shape and structure of the plants by keeping cells turgid.

• It is responsible for cooling of leaf surfaces upto 10 to 15 degrees.

Highest water potential is observed in case of

• Solution in a beaker

• Cell sap

• Pure water solvent

• All of the above

During the translocation of food in plants, the sink

• Has low osmotic pressure as compared to phloem sap

• Has more osmotic pressure as compared to phloem sap

• Receives sucrose molecules from phloem sap by facilitated diffusion

• Is the part that synthesises the food

The direction of water along with dissolved minerals in xylem is

• Bidirectional

• Multidirectional

• From shoot to roots

• From roots to shoot

The loss of water in liquid phase from the plant leaves is known as

• Transpiration

• Guttation

• Evaporation

• Diffusion

The Na+/K+ pump of nerve cells

• Is an energy-dependent membrane transporter

• Is involved in passive transport of ions

• Transports ions along their concentration gradient

• Never shows saturation of transport