Friday Special

1. Which of the following is NOT a macronutrient required for plant growth?

• A) Nitrogen

• B) Potassium

• C) Zinc

• D) Phosphorus

2. The primary role of nitrogen in plants is to:

• A) Assist in photosynthesis

• B) Build amino acids and proteins

• C) Strengthen cell walls

• D) Promote water uptake

3. Deficiency of which of the following nutrients in plants results in chlorosis, or yellowing of leaves?

• A) Magnesium

• B) Iron

• C) Calcium

• D) Nitrogen

4. Which of the following elements is involved in the synthesis of chlorophyll?

• A) Sulfur

• B) Iron

• C) Manganese

• D) Boron

5. What is the main function of potassium in plants?

• A) Regulation of water balance and stomatal function

• B) Synthesis of proteins and enzymes

• C) Structural support in cell walls

• D) Formation of chlorophyll

6. The process of ion exchange in plant roots involves the release of protons (H⁺) to displace nutrient ions from soil particles. Which of the following best describes the role of this mechanism in plant mineral nutrition?

• A) It enhances the uptake of potassium and calcium ions by root cells.

• B) It regulates the pH of the soil, preventing nutrient toxicity.

• C) It increases the availability of essential cations like potassium, calcium, and magnesium.

• D) It enables the active transport of anions like nitrate and phosphate into the plant.

7. Which of the following minerals is essential for activating certain enzymes involved in energy transfer reactions in plants?

• A) Molybdenum

• B) Phosphorus

• C) Magnesium

• D) Copper