AP BIOLOGY

PLANTS

TRANSPORT IN PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Assertion:More is the number of solute molecules, the lower (more negative) is w.Reason:Presence of solute particles reduces the free energy of water and this decreases the water potential.
A
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false
Explanation: 

Detailed explanation-1: -When solute is dissolved in water, the amount of free water molecules reduces causing the kinetic energy of the molecules to reduce. Therefore the solute potential reduces.

Detailed explanation-2: -2) The water potential of pure water is 0 at standard conditions of temperature and pressure. As the number of solute molecules increases, the drop in magnitude of water potential is more and hence, solute potential decreases.

Detailed explanation-3: -When any solute is dissolved in water, it reduces the kinetic energy of water molecules or the water concentration, therefore water potential of any solution is always less than pure water. The more the solute concentration, the more negative or lower is the solute potential.

Detailed explanation-4: -A concentrated solution: contains a relatively large amount of solute dissolved in the solution.

There is 1 question to complete.