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

 Macronutrient

 Micronutrient

 Beneficial nutrient

 Essential nutrient

3. Plants are classified as autotrophs because they _______________

 Absorb nutrients directly from other plants

 Depend on animals for their food

 Manufacture their own food using sunlight, water, and CO₂

 Obtain nutrients by decomposing organic matter

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

 Calcium

 Magnesium

 Potassium

 Manganese

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

 Phosphorus

 Magnesium

 Sodium

 Nitrogen

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

 Exchange cations

 Hold water

 Fix nitrogen

 Absorb light

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

 Soil availability

 Biochemical participation

 Growth enhancement

 Yield increase

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

 Cobalt

 Sodium

 Chlorine

 Silicon

9. Which of the following is an essential micronutrient?

 Zinc

 Sodium

 Cobalt

 Silicon

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

 Magnesium

 Potassium

 Calcium

 Nitrogen

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