Fundamentals of Plant Nutrition MCQs Quiz 3

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

 Stomata

 Root hair cells

 Leaf surface

 Stem lenticels

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

 3.5–4.5

 7.5–9.0

 5.5–7.0

 9.0–10.0

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

 Synergism

 Antagonism

 Mobility

 Specificity

4. Plants are called producers because they _______

 Absorb minerals

 Produce food

 Consume oxygen

 Release water

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

 Iron

 Potassium

 Sulfur

 Calcium

6. The food produced during photosynthesis is mainly _______.

 Carbohydrate

 Fat

 Protein

 Minerals

7. Which process is opposite to photosynthesis?

 Transpiration

 Digestion

 Respiration

 Absorption

8. Which condition distinguishes essential from beneficial nutrients?

 Essential nutrients improve yield only

 Beneficial nutrients are required in large amounts

 Essential nutrients cannot be substituted by another element

 Beneficial nutrients are always toxic

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

 Potassium

 Sulfur

 Phosphorus

 Nitrogen

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

 Potassium

 Phosphorus

 Calcium

 Nitrogen

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