Fundamentals of Plant Nutrition MCQs Quiz 3

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

 Stomata

 Root hair cells

 Stem lenticels

 Leaf surface

2. Plants are called producers because they _______

 Consume oxygen

 Produce food

 Absorb minerals

 Release water

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

 Phosphorus

 Potassium

 Sulfur

 Nitrogen

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

 7.5–9.0

 5.5–7.0

 9.0–10.0

 3.5–4.5

5. Which condition distinguishes essential from beneficial nutrients?

 Essential nutrients improve yield only

 Beneficial nutrients are always toxic

 Essential nutrients cannot be substituted by another element

 Beneficial nutrients are required in large amounts

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

 Mobility

 Antagonism

 Specificity

 Synergism

7. The food produced during photosynthesis is mainly _______.

 Minerals

 Carbohydrate

 Fat

 Protein

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

 Iron

 Potassium

 Calcium

 Sulfur

9. Which process is opposite to photosynthesis?

 Respiration

 Digestion

 Transpiration

 Absorption

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

 Nitrogen

 Potassium

 Calcium

 Phosphorus

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