Question

Which of the following nutrient elements cannot undergo remobilization in plants?

• A. Nitrogen
• B. Potassium
• C. Calcium
• D. Magnesium

Answer 1

The correct option is C

Calcium

The correct option is C.

Explanation of Correct option:

1. Calcium contributes to the structural makeup of the plant so cannot be re- mobilized easily and is called immobile element.
2. But nitrogen, potassium and magnesium can be broken down and extracted from the older leaves and readily transported within plants.

Explanation of Incorrect option:

Option A:

1. Nitrogen is a component of the chlorophyll molecule
2. It enables the plant to capture sunlight energy by photosynthesis, driving plant growth and grain yield.
3. Nitrogen plays a critical role within the plant to ensure energy is available when and where the plant needs it to optimize yield.

Option B:

1. Potassium is associated with the movement of water, nutrients and carbohydrates in plant tissue.
2. It is involved with enzyme activation within the plant, which affects protein, starch and ATP production.
3. The production of ATP can regulate the rate of photosynthesis.

Option D:

Magnesium is the central core of the chlorophyll molecule in plant tissue.

Final answer:
Nutrient elements cannot undergo remobilization in plants is calcium.