Fundamentals of Plant Nutrition MCQs Quiz 5

1. Which of the following is an essential micronutrient?

 Sodium

 Zinc

 Silicon

 Cobalt

2. A nutrient that enhances tolerance to abiotic stress but is not essential is classified as _______.

 Micronutrient

 Macronutrient

 Beneficial nutrient

 Essential nutrient

3. Cation Exchange Capacity (CEC) refers to the soil’s ability to _______.

 Absorb light

 Hold water

 Exchange cations

 Fix nitrogen

4. Which of the following elements is essential due to its role in protein synthesis and amino acids?

 Nitrogen

 Magnesium

 Potassium

 Calcium

5. The criterion that ensures an element is directly involved in plant metabolism rather than acting indirectly is ____________________

 Growth enhancement

 Biochemical participation

 Soil availability

 Yield increase

6. A plant shows improved growth after the addition of an element, but can still complete its life cycle without it. This element can be categorised as _______.

 Beneficial nutrient

 Essential nutrient

 Limiting nutrient

 Macronutrient

7. Plants are classified as autotrophs because they _______________

 Obtain nutrients by decomposing organic matter

 Absorb nutrients directly from other plants

 Depend on animals for their food

 Manufacture their own food using sunlight, water, and CO₂

8. Which macronutrient is part of the chlorophyll molecule and plays a key role in photosynthesis?

 Manganese

 Potassium

 Calcium

 Magnesium

9. Which element is beneficial, particularly for legumes, due to its role in nitrogen fixation?

 Silicon

 Chlorine

 Cobalt

 Sodium

10. Which of the following elements is beneficial for osmotic regulation in some plants but not essential?

 Sodium

 Phosphorus

 Magnesium

 Nitrogen

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