The Question is from neet-botany , and it was created by the author K SURESH KUMAR

Question

Passive absorption of mineral salts is not dependent on

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [B]
## CONCEPT FRAMEWORK
	**Primary Concept**: Passive Transport Mechanisms in Plants
	**Related Topics**: Membrane Transport, Mineral Nutrition, Plant Physiology
	**Prerequisites**: Basic knowledge of plant cell structure and transport processes.
## SOLUTION PATHWAY
**Given Information**:
	The question asks which mechanism passive absorption of mineral salts *does not* depend on.
	Passive absorption implies movement without metabolic energy.
**Method & Steps**:
	1. **Understand Passive Transport:** Passive transport includes movement down a concentration gradient or electrical gradient.
		Reasoning: This requires no energy input by the cell.
	2. **Analyze each option**:
		Diffusion: Movement down a concentration gradient is a key part of passive absorption. Mineral ions can move from high to low concentration.
		Osmosis: Osmosis is the movement of water across a semi-permeable membrane due to a concentration gradient. While water movement can influence mineral uptake, mineral uptake itself is not directly dependent on osmosis.
		Donnan Equilibrium: This is a state of equilibrium between charged particles on either side of a membrane. It influences the distribution of ions, and is a passive process.
		Ionic Exchange: This involves the exchange of ions across a membrane, driven by concentration or electrical gradients, and is also a passive process.
	3. **Identify the exception**: Osmosis is primarily about water movement, whereas mineral absorption is about ion movement. The question is about mineral absorption, not water movement.  Therefore, it is the exception.
		Result: Osmosis is not directly involved in the passive absorption of mineral salts.
## OPTION ANALYSIS
[A] :x: Diffusion is a key component of passive mineral absorption.
[B] ✓: Osmosis is primarily about water movement, not mineral ion movement.
[C] :x: Donnan equilibrium influences ion distribution passively.
[D] :x: Ionic exchange is a passive mechanism for ion movement.
## LEARNING AIDS
	**Common Mistakes**:
		1.[Confusing water and mineral movement]: [Students may mix up the mechanisms of water and ion movement.]
		2.[Misunderstanding passive transport]: [Not grasping the definition of passive transport]
	**Quick Tips**:
		1.[Focus on the primary target]: [Pay close attention to the specific process mentioned in the question.]
		2.[Eliminate options]: [Use the process of elimination to narrow down the choices.]

K SURESH KUMAR · Answer

Diffusion

K SURESH KUMAR · Answer

The correct Option is "Osmosis"

K SURESH KUMAR · Answer

Donnan equilibrium

K SURESH KUMAR · Answer

Ionic exchange

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