Question

11. All of the following have an effect on water potential (Y) in plants except:
A. Physical pressure
B. Organic solutes
C. Inorganic solutes
D. DNA

Answer 1

Answer:

Capillarity

Water potential is the difference between free energy of water molecules in pure form and energy of water in the solution. The three major factors that influence water potential are solute concentration, atmospheric pressure and gravity. Thus, The correct option is D.

Explanation:

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Answer 2

The answer will be All of the following have an effect on water potential (Y) in plants except D). DNA.

As per the other options:

• A. physical pressure- The measurement of water potential gets increased by the exerted positive amount of pressure. However, the water potential decreases due to negative physical pressure.
• B. Organic solutes- When the concentration of the organic solutes increases, the net solute potential decreases. This affects the water potential as the net amount of water potential also decreases with an increase in the organic solute concentration.
• C. Inorganic solutes- Much like the organic solute concentration, inorganic types of solutes also adversely affect the concentration of the total water potential.

Only DNA does not cause any effect on the water potential. Hence, the correct option will be D). DNA.

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