Fundamentals of Plant Nutrition MCQs Quiz 3

1. The food produced during photosynthesis is mainly _______.

 Fat

 Carbohydrate

 Protein

 Minerals

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

 3.5–4.5

 7.5–9.0

 9.0–10.0

 5.5–7.0

3. Which process is opposite to photosynthesis?

 Transpiration

 Respiration

 Digestion

 Absorption

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

 Synergism

 Antagonism

 Specificity

 Mobility

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

 Potassium

 Phosphorus

 Sulfur

 Nitrogen

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

 Potassium

 Calcium

 Sulfur

 Iron

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

 Potassium

 Nitrogen

 Phosphorus

 Calcium

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

 Leaf surface

 Root hair cells

 Stomata

 Stem lenticels

10. Plants are called producers because they _______

 Produce food

 Absorb minerals

 Consume oxygen

 Release water

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