Fundamentals of Plant Nutrition MCQs Quiz 5

1. 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 _______.

 Macronutrient

 Beneficial nutrient

 Essential nutrient

 Limiting nutrient

2. Plants are classified as autotrophs because they _______________

 Obtain nutrients by decomposing organic matter

 Depend on animals for their food

 Absorb nutrients directly from other plants

 Manufacture their own food using sunlight, water, and CO₂

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

 Exchange cations

 Hold water

 Fix nitrogen

 Absorb light

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

 Biochemical participation

 Soil availability

 Yield increase

 Growth enhancement

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

 Manganese

 Potassium

 Calcium

 Magnesium

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

 Essential nutrient

 Beneficial nutrient

 Macronutrient

 Micronutrient

7. Which of the following is an essential micronutrient?

 Cobalt

 Sodium

 Silicon

 Zinc

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

 Cobalt

 Silicon

 Sodium

 Chlorine

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

 Nitrogen

 Potassium

 Magnesium

 Calcium

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

 Nitrogen

 Sodium

 Phosphorus

 Magnesium

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