Fundamentals of Plant Nutrition MCQs Quiz 3

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

 Phosphorus

 Nitrogen

 Sulfur

 Potassium

2. The food produced during photosynthesis is mainly _______.

 Carbohydrate

 Fat

 Minerals

 Protein

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

 9.0–10.0

 5.5–7.0

 3.5–4.5

 7.5–9.0

4. Which process is opposite to photosynthesis?

 Digestion

 Transpiration

 Absorption

 Respiration

5. Plants are called producers because they _______

 Release water

 Consume oxygen

 Absorb minerals

 Produce food

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

 Potassium

 Calcium

 Nitrogen

 Phosphorus

7. Which condition distinguishes essential from beneficial nutrients?

 Essential nutrients improve yield only

 Essential nutrients cannot be substituted by another element

 Beneficial nutrients are always toxic

 Beneficial nutrients are required in large amounts

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

 Specificity

 Antagonism

 Mobility

 Synergism

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

 Calcium

 Iron

 Sulfur

 Potassium

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

 Stomata

 Root hair cells

 Stem lenticels

 Leaf surface

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