Tag: water potential and pressure

Questions Related to water potential and pressure

Which of the following statements is correct?

water potential water potential and pressure plant water relation transport in plants biology

  1. Bacteria do not survive in salted pickles because they get plasmolysed in hypertonic medium

  2. Osmotic potential is numerically equal to the osmotic pressure but is negative in sign

  3. Kneading of wheat flour is accompanied by release of heat which is due to imbibition

  4. All of these

Show answer
Correct Option: D
Explanation:

Following are the correct statements:

(1) Bacteria do not survive in salted pickles because they get plasmolysed in hypertonic medium.
(2) Osmotic potential is numerically equal to the osmotic pressure but is negative in sign.
(3) Kneading of wheat flour is accompanied by the release of heat which is due to imbibition.
So, the correct answer is (d).

Choose the correct answers from the alternatives given :
In which one of the following processes the phenomenon of osmosis is not involved

water potential water potential and pressure plant water relation transport in plants biology

  1. Water entering a mesophyll cell from xylem vessel element

  2. Water passing from root hair to adjacent cells

  3. Water from soil entering a root hair

  4. Water passing up a xylem vessel element to xylem vessel above it

Show answer
Correct Option: D
Explanation:

Osmosis is the movement of solvent from its higher concentration to its lower concentration across a semipermeable membrane. Movement of water through xylem element to xylem vessels above it occurs due to the cohesive force between the water molecules, suction pressure and transpiration pull.


So the correct answer is "Water passing up a xylem vessels element to xylem vessel above it".