Question

Match List I with List II
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Choose the correct answer from the options given below:}

• A. A-I, B-V, C-II, D-III
• B. A-II, B-III, C-I, D-V
• C. A-III, B-II, C-V, D-I
• D. A-V, B-I, C-IV, D-II

Hint:

Manganese (Mn) is for Oxygen Evolving Complex; Magnesium (Mg) is for Rubisco activation. Don't confuse these two!

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Plant nutrients play specific structural and catalytic roles in metabolic pathways. Matching an element to its unique biochemical niche is a fundamental aspect of plant physiology and biotechnology.

Step 2: Detailed Explanation:
- A. Calcium (V): Calcium ions (\(Ca^{2+}\)) are crucial for maintaining the structural integrity of the plant cell wall (middle lamella) and are involved in the stabilization of chromosomes and the mitotic spindle during cell division. (Match with V).
- B. Zinc (I): Zinc is a metallic co-factor for several important enzymes, including carbonic anhydrase and Cu-Zn Superoxide Dismutase (SOD), which protects cells from oxidative stress. (Match with I).
- C. Sulphur (IV): Sulphur is a constituent of sulfur-containing amino acids (cysteine, methionine) and molecules like Glutathione, which is essential for redox signaling and detoxification. (Match with IV).
- D. Magnesium (II): Besides being the central atom of chlorophyll, \(Mg^{2+}\) is the essential activator for many phosphate-transferring enzymes and specifically for RuBP carboxylase (Rubisco) and PEP carboxylase in the Calvin cycle. (Match with II).
This matching sequence corresponds to A-V, B-I, C-IV, D-II.

Step 3: Final Answer:
The correct matching is A-V, B-I, C-IV, D-II.