Fundamentals of Plant Nutrition MCQs Quiz 3

1. Which macronutrient is primarily responsible for root development and energy transfer (ATP) in plants?

 Sulfur

 Phosphorus

 Potassium

 Nitrogen

2. Which condition distinguishes essential from beneficial nutrients?

 Beneficial nutrients are always toxic

 Essential nutrients cannot be substituted by another element

 Beneficial nutrients are required in large amounts

 Essential nutrients improve yield only

3. The food produced during photosynthesis is mainly _______.

 Fat

 Carbohydrate

 Minerals

 Protein

4. Which of the following is classified as a micronutrient (trace element) in plant nutrition?

 Sulfur

 Potassium

 Calcium

 Iron

5. Plants are called producers because they _______

 Produce food

 Absorb minerals

 Release water

 Consume oxygen

6. The inability of one element to replace another in plant metabolism indicates _______

 Mobility

 Antagonism

 Synergism

 Specificity

7. Which process is opposite to photosynthesis?

 Digestion

 Absorption

 Transpiration

 Respiration

8. Plants absorb most of their water and dissolved minerals through _____________

 Stomata

 Root hair cells

 Stem lenticels

 Leaf surface

9. Which soil pH range generally provides maximum nutrient availability?

 5.5–7.0

 9.0–10.0

 3.5–4.5

 7.5–9.0

10. Which nutrient is universally essential due to its role in ATP formation?

 Calcium

 Potassium

 Phosphorus

 Nitrogen

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