Which of the following combinations correctly matches the ion, its role in plants, and a typical mechanism of its uptake?\n(A) Calcium - Cell wall component - Symport with protons\n(B) Potassium - Stomatal regulation - Channel proteins\n(C) Nitrate - Nucleic acid synthesis - Active transport through ATPases\n(D) Magnesium - Chlorophyll constituent - Passive diffusion

## CORE INFORMATION\n✓ **Answer**: B\n## CONCEPT FRAMEWORK\n **Primary Concept**: Plant ion uptake mechanisms\n **Related Topics**: Plant nutrition, membrane transport, ion channels, active transport, passive transport\n **Prerequisites**: Understanding of plant physiology, basic biochemistry, and membrane transport processes.\n## SOLUTION PATHWAY\n**Given Information**:\nFour options, each stating an ion, its role in plants, and its uptake mechanism.\n**Method & Steps**:\n1. Analyze each option individually to determine its accuracy.\n Reasoning: Evaluate the correctness of the ion's role and the mechanism of uptake.\n Formula/Rule: No specific formula is required; the solution relies on biological knowledge.\n2. Identify the option with the correct combination of ion, role, and uptake mechanism.\n Working: \n * Option A: Calcium is a component of the cell wall, but its uptake primarily involves symport with protons. This statement is largely correct.\n * Option B: Potassium plays a crucial role in stomatal regulation, and its uptake predominantly occurs through channel proteins. This statement is correct.\n * Option C: Nitrate is essential for nucleic acid synthesis, but its uptake typically involves active transport, often through nitrate transporters, not solely ATPases. This statement is partially correct but lacks precision.\n * Option D: Magnesium is a constituent of chlorophyll, but its uptake is not simply passive diffusion; it also involves active transport mechanisms. This statement is incorrect.\n Key Point: The question asks for a *correct* match, not just a partially correct one. The mechanism of uptake must be the primary mechanism.\n3. Determine the most accurate option.\n Result: Option B is the most accurate, as both the role of potassium and its primary uptake mechanism are correctly stated.\n Verification: Review the biological roles of the ions and their known transport mechanisms in plants.\n## OPTION ANALYSIS\nA :x: While Calcium is a cell wall component and symport with protons is a mechanism of uptake, it's not the only or primary mechanism. Therefore, this option is not completely accurate.\nB ✓: Potassium is vital for stomatal regulation, and channel proteins are the primary mechanism for its uptake. This is the correct option.\nC :x: While nitrate is used in nucleic acid synthesis and active transport is involved, specifying ATPases is an oversimplification. Nitrate transporters are more accurate.\nD :x: Magnesium is crucial for chlorophyll, but its uptake isn't solely passive diffusion; active transport is also involved.\n## LEARNING AIDS\n **Common Mistakes**:\n 1. Oversimplifying the ion uptake mechanisms: Many ions utilize multiple transport mechanisms. \n 2. Confusing the primary role of an ion with a secondary role.\n **Quick Tips**:\n 1. Familiarize yourself with the major roles of essential plant nutrients.\n 2. Understand the different types of membrane transport (passive, active, symport, antiport, etc.).

NEET Botany Mineral Nutrition MCQs

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NEET Questions / Botany / Mineral Nutrition

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Root Nodule Formation

Which of the following combinations correctly matches the ion, its role in plants, and a typical mechanism of its uptake?

(A) Calcium - Cell wall component - Symport with protons

(B) Potassium - Stomatal regulation - Channel proteins

(D) Magnesium - Chlorophyll constituent - Passive diffusion

Question Tags

📚 Subject:Botany

📑 Chapter:Mineral Nutrition

🎯Topic:Ion Uptake

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :Ion uptake, Mineral nutrition, Potassium, Calcium, Nitrate, Magnesium

A plant exposed to high levels of aluminum in the soil exhibits stunted root growth. Which of the following mechanisms is the MOST likely cause of this effect?

Aluminum directly inhibits photosynthesis, reducing energy available for root growth.

Aluminum competes with potassium for uptake, leading to potassium deficiency in roots.

Aluminum interferes with the function of calcium channels and disrupts cell wall formation.

Aluminum stimulates excessive ethylene production, inhibiting root elongation.