The Question is from neet-botany plant-physiology plasmolysis, and it was created by the author D VINOD

Question

During plasmolysis, the cell membrane separates from the cell wall. This separation is primarily due to:

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Plasmolysis
 **Related Topics**: Osmosis, Water potential, Turgor pressure
 **Prerequisites**: Understanding of cell structure (cell wall, cell membrane, protoplast), osmosis and water movement across membranes.
## SOLUTION PATHWAY
**Given Information**:
  Plasmolysis is occurring, meaning the cell membrane is separating from the cell wall.
  The question asks for the primary cause of this separation.
**Method & Steps**:
 1. Understand Plasmolysis:
  Reasoning: Plasmolysis is the process in which plant cells lose water in a hypertonic solution.  This leads to shrinkage of the cell's cytoplasm (protoplast).
  Formula/Rule:  No specific formula, understanding of osmosis is key.
 2. Analyze the options:
  Working: Let's evaluate each option:
  Option A: Increased turgor pressure causes the cell to swell, not shrink. 
  Option B: Water loss leads to shrinkage of the protoplast (cytoplasm), causing it to pull away from the cell wall. This is plasmolysis.
  Option C: Cell wall breakdown is not the primary cause of plasmolysis. While it might eventually happen in severe cases, the initial separation is due to water loss.
  Option D: While water is actively transported in some cases, passive movement through osmosis is the primary driver of water loss in plasmolysis.
 3. Final Step:
  Result: The correct answer is B. The shrinking of the protoplast due to water loss is the primary cause of the cell membrane separating from the cell wall during plasmolysis.
  Verification: The description matches the definition of plasmolysis.
 ## OPTION ANALYSIS
A :x: The expansion of the cell wall is associated with turgid cells, the opposite of plasmolysis.
B ✓: The shrinking of the protoplast is the direct consequence of water loss, causing the cell membrane to detach from the cell wall.
C :x: While cell wall breakdown can occur, it's not the immediate cause of plasmolysis. 
D :x:  Osmosis (passive water movement) is the main mechanism, not active transport in this context.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing plasmolysis with deplasmolysis (water uptake): Remember that plasmolysis involves water loss.
  2.Focusing on cell wall breakdown: Understand that the initial separation is due to protoplast shrinkage.
 **Quick Tips**:
  1.Visualize the process: Imagine a balloon (protoplast) inside a rigid container (cell wall). Water loss makes the balloon shrink and detach.
  2.Remember the hypertonic solution: Plasmolysis occurs when the external solution has a higher solute concentration than the cell's cytoplasm.

D VINOD · Answer

The expansion of the cell wall due to increased turgor pressure.

D VINOD · Answer

The correct Option is "The shrinking of the protoplast due to water loss."

D VINOD · Answer

The breakdown of the cell wall by hydrolytic enzymes.

D VINOD · Answer

The active transport of water out of the cell.

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