The Question is from neet-botany plant-physiology imbibition, and it was created by the author Mr. NARESH KUMAR K

Question

The matrix potential of a cell during imbibition is:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Water potential and its components in plant cells.
 **Related Topics**: Imbibition, osmosis, water movement in plants.
 **Prerequisites**: Understanding of water potential, solute potential, pressure potential, and matrix potential.
## SOLUTION PATHWAY
**Given Information**:
  The process is imbibition.
  We need to determine the matrix potential.
**Method & Steps**:
 1. Understand Imbibition:
  Reasoning: Imbibition is the process by which water is absorbed by hydrophilic colloids (like those in cell walls) causing them to swell.
  Formula/Rule:  Water potential ($Ψ$) = Solute potential ($Ψ_s$) + Pressure potential ($Ψ_p$) + Matrix potential ($Ψ_m$)
 2. Analyze Matrix Potential during Imbibition:
  Working: During imbibition, water enters the cell wall, causing it to swell. This swelling generates a negative pressure, reducing the water potential. The matrix potential represents the contribution of the cell wall's binding forces to the overall water potential.  Since water is being absorbed, the matrix potential becomes more negative.
  Key Point: Matrix potential is always negative, as it reflects the attractive forces between water molecules and the matrix.
 3. Final Conclusion:
  Result: The matrix potential of a cell during imbibition is negative.
  Verification: The negative matrix potential contributes to the overall negative water potential of the cell, driving the uptake of water.
 ## OPTION ANALYSIS
A :x: Positive matrix potential is not possible as it represents attractive forces that reduce water potential.
B :x: Zero matrix potential would imply no attractive forces, which is not the case in a cell wall.
 C ✓: Negative matrix potential is consistent with the attractive forces between water and the cell wall matrix during imbibition.
D :x: While matrix potential can vary, it remains negative during imbibition. It doesn't become positive or zero.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing matrix potential with pressure potential:  Remember that pressure potential can be positive (turgor pressure) or negative (tension), while matrix potential is always negative.
  2.Ignoring the role of the matrix:  Understanding the importance of the cell wall and its hydrophilic components is crucial in grasping the concept of matrix potential.
 **Quick Tips**:
  1.Think of the cell wall as a sponge:  The sponge's ability to hold water is related to its matrix potential, and the water entering the sponge reduces the overall potential.
  2.Remember:  Imbibition leads to a decrease in water potential, and matrix potential is a significant contributor to this decrease.

Mr. NARESH KUMAR K · Answer

Positive

Mr. NARESH KUMAR K · Answer

Zero

Mr. NARESH KUMAR K · Answer

The correct Option is "Negative"

Mr. NARESH KUMAR K · Answer

Variable

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