Fundamentals of Plant Nutrition MCQs Quiz 2

1. Soil pH primarily influences nutrient availability by affecting _______

 Soil color

 Plant height

 Nutrient solubility

 Root length

2. A nutrient directly involved in plant metabolism but not required for all species is classified as _______.

 Micronutrient

 Macronutrient

 Beneficial nutrient

 Essential nutrient

3. Sunlight is essential for photosynthesis because it provides _______

 Energy

 Oxygen

 Water

 Carbon dioxide

4. ____________ soil has the highest cation exchange capacity (CEC)

 Clay soil

 Sandy soil

 Gravel soil

 Loamy sand

5. Which element is considered essential due to its role in amino acid synthesis?

 Nitrogen

 Calcium

 Magnesium

 Carbon

6. Which of the following best describes the term “essential nutrient”?

 Improves soil structure

 Indispensable for plant growth and reproduction

 Required only in trace amounts

 Enhances growth under stress conditions

7. Which of the following elements is considered beneficial but not essential for all plants?

 Silicon

 Potassium

 Phosphorus

 Nitrogen

8. If a plant lacks chlorophyll, it cannot _______.

 Respire

 Grow

 Photosynthesize

 Absorb water

9. Water in photosynthesis is primarily used for _______.

 Providing hydrogen and electrons

 Transport

 Supporting structure

 Cooling leaves

10. Which of the following is NOT part of Arnon and Stout criteria?

 Direct involvement in metabolism

 Essential for all plant species

 Deficiency prevents life cycle completion

 Cannot be replaced by another element

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