Fundamentals of Plant Nutrition MCQs Quiz 5

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

 Sodium

 Phosphorus

 Nitrogen

 Magnesium

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

 Silicon

 Cobalt

 Sodium

 Chlorine

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

 Macronutrient

 Beneficial nutrient

 Essential nutrient

 Micronutrient

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

 Potassium

 Calcium

 Manganese

 Magnesium

5. 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 _______.

 Essential nutrient

 Limiting nutrient

 Beneficial nutrient

 Macronutrient

6. 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

7. Which of the following is an essential micronutrient?

 Zinc

 Silicon

 Sodium

 Cobalt

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

 Hold water

 Fix nitrogen

 Exchange cations

 Absorb light

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

 Potassium

 Nitrogen

 Calcium

 Magnesium

10. Plants are classified as autotrophs because they _______________

 Obtain nutrients by decomposing organic matter

 Manufacture their own food using sunlight, water, and CO₂

 Depend on animals for their food

 Absorb nutrients directly from other plants

 Loading …

Question 1 of 10