NEET 2025 MCQ with Answer Explanation : “Mineral Nutrition”.

Here below some basic MCQ’s about “Mineral Nutrition” with answer which is explained details. Let’s check one by one which is given below.

Question 1
Which of the following minerals is primarily involved in the synthesis of chlorophyll?

A) Nitrogen
B) Iron
C) Magnesium
D) Manganese

Answer: B) Iron

Explanation: Iron is essential for the synthesis of chlorophyll. A deficiency in iron leads to chlorosis, particularly in young leaves, due to its critical role in photosynthesis and the formation of chlorophyll.

Question 2
What is the main function of potassium in plants?

A) Protein synthesis
B) Water regulation
C) Photosynthesis
D) DNA replication

Correct Answer: B) Water regulation

Explanation: Potassium plays a vital role in osmoregulation and helps maintain turgor pressure in plant cells, which is crucial for water regulation. It also activates various enzymes but is primarily known for its role in water management.

Question 3
A plant shows stunted growth and dark green leaves. What nutrient deficiency might this indicate?

A) Phosphorus
B) Nitrogen
C) Calcium
D) Zinc

Correct Answer: A) Phosphorus

Explanation: Phosphorus deficiency typically leads to stunted growth and can cause leaves to develop a darker green color. Phosphorus is essential for energy transfer and nucleic acid formation, so its deficiency directly impacts growth.

Question 4
Which micronutrient is most important for the formation of enzymes and hormones in plants?

A) Copper
B) Boron
C) Manganese
D) Zinc

Correct Answer: D) Zinc

Explanation: Zinc is crucial for the synthesis of various enzymes and plant hormones. It plays a key role in growth regulation and is important for the overall metabolic processes in plants.

Question 5
In which condition does the availability of phosphorus decrease significantly in the soil?

A) Acidic soil
B) Alkaline soil
C) Neutral soil
D) Loamy soil

Correct Answer: A) Acidic soil

Explanation: In acidic soils, phosphorus can form insoluble complexes with iron and aluminum, making it less available to plants. Alkaline soils can also cause issues, but phosphorus is most notably tied to acidity-related availability problems.

Question 6
Which of the following is a major component of amino acids?

A) Phosphorus
B) Nitrogen
C) Potassium
D) Calcium

Correct Answer: B) Nitrogen

Explanation: Nitrogen is a key component of amino acids, which are the building blocks of proteins. It is essential for plant growth and development.

Question 7
What is the role of calcium in plants?

A) Energy transfer
B) Cell wall stability
C) Chlorophyll synthesis
D) Protein synthesis

Correct Answer: B) Cell wall stability

Explanation: Calcium is important for maintaining the structural integrity of cell walls and plays a role in cell division and signaling.

Question 8
Which deficiency is characterized by necrotic spots and leaf curling?

A) Nitrogen
B) Potassium
C) Calcium
D) Magnesium

Correct Answer: B) Potassium

Explanation: Potassium deficiency often results in leaf curling and necrotic spots due to its role in osmoregulation and enzyme activation.

Question 9
Manganese is primarily involved in which of the following processes?

A) Photosynthesis
B) Respiration
C) Nucleic acid synthesis
D) Lipid metabolism

Correct Answer: A) Photosynthesis

Explanation: Manganese plays a crucial role in the photosynthetic process, particularly in the water-splitting reaction.

Question 10
A plant showing interveinal chlorosis is most likely deficient in:

A) Nitrogen
B) Magnesium
C) Potassium
D) Calcium

Correct Answer: B) Magnesium

Explanation: Magnesium deficiency leads to interveinal chlorosis because magnesium is a central component of chlorophyll.