Fundamentals of Plant Nutrition MCQs Quiz 5

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

 Macronutrient

 Essential nutrient

 Micronutrient

 Beneficial nutrient

2. Which of the following is an essential micronutrient?

 Cobalt

 Silicon

 Zinc

 Sodium

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

 Phosphorus

 Magnesium

 Sodium

 Nitrogen

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

 Yield increase

 Growth enhancement

 Biochemical participation

 Soil availability

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

 Manganese

 Calcium

 Magnesium

 Potassium

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

 Exchange cations

 Hold water

 Fix nitrogen

 Absorb light

7. 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 _______.

 Limiting nutrient

 Macronutrient

 Essential nutrient

 Beneficial nutrient

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

 Magnesium

 Nitrogen

 Calcium

 Potassium

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

 Sodium

 Cobalt

 Chlorine

 Silicon

10. Plants are classified as autotrophs because they _______________

 Depend on animals for their food

 Obtain nutrients by decomposing organic matter

 Absorb nutrients directly from other plants

 Manufacture their own food using sunlight, water, and CO₂

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