Plant Nutrients Pretest

What is the primary role of Nitrogen in plants?

• It helps in the formation of chlorophyll.

• It is crucial for water regulation.

• It aids in seed germination.

• It strengthens plant cell walls.

Why is Phosphorus important for plant growth?

• It is essential for photosynthesis.

• It plays a key role in energy transfer.

• It enhances water uptake.

• It increases resistance to diseases.

What function does Potassium serve in plants?

• It is a primary component of cell walls.

• It regulates stomatal opening and closing.

• It is directly involved in chlorophyll production.

• It aids in nitrogen fixation.

How does Calcium contribute to plant nutrition?

• By activating certain enzymes.

• By improving flavor in fruits and vegetables.

• By contributing to the structural development of cell walls and membranes.

• By enhancing the absorption of other nutrients.

What is the role of Magnesium in photosynthesis?

• It serves as a cofactor for enzymes involved in photosynthesis.

• It is a central component of the chlorophyll molecule.

• It increases the absorption of light energy.

• It facilitates the transport of sugars.

How does Iron contribute to chlorophyll production in plants?

• By increasing the rate of photosynthesis.

• By acting as a catalyst in the synthesis of chlorophyll.

• By facilitating the transport of oxygen.

• By enhancing the absorption of light.

Which nutrient is primarily responsible for the green color of plants?

• Nitrogen

• Potassium

• Magnesium

• Iron

What deficiency symptom might indicate a lack of Phosphorus in plants?

• Yellowing of leaves

• Stunted growth

• Brown spots on leaves

• Drooping leaves

Which of the following is NOT a function of Potassium in plants?

• Enhancing disease resistance

• Improving fruit quality

• Direct involvement in DNA synthesis

• Regulating water content

Magnesium deficiency in plants is often first visible as:

• Purple spots on leaves.

• Interveinal chlorosis in older leaves.

• Dark green veins with yellowing between veins.

• Curling of leaf edges.