Fundamentals of Plant Nutrition MCQs Quiz 3

1. The food produced during photosynthesis is mainly _______.

 Protein

 Minerals

 Carbohydrate

 Fat

2. Which process is opposite to photosynthesis?

 Respiration

 Absorption

 Digestion

 Transpiration

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

 Nitrogen

 Sulfur

 Potassium

 Phosphorus

4. 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

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

 Antagonism

 Synergism

 Mobility

 Specificity

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

 Sulfur

 Potassium

 Calcium

 Iron

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

 Potassium

 Calcium

 Phosphorus

 Nitrogen

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

 3.5–4.5

 5.5–7.0

 9.0–10.0

 7.5–9.0

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

 Stomata

 Stem lenticels

 Root hair cells

 Leaf surface

10. Plants are called producers because they _______

 Consume oxygen

 Release water

 Produce food

 Absorb minerals

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