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Which nutrient plays the key role in sugar synthesis in sugarcane?

1. Potassium
2. Magnesium
3. Nitrogen
4. Copper

Correct answer: Potassium

Solution

Potassium plays a key role in sugar synthesis in sugarcane by activating enzymes (sucrose synthase, pyruvate kinase) involved in carbohydrate metabolism and facilitating sugar transport from leaves to stalks. Nitrogen is for protein synthesis; Magnesium is the central atom of chlorophyll; Copper is for electron transport.

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