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

Question 11
Which nutrient is critical for the formation of nucleic acids?

A) Phosphorus
B) Iron
C) Boron
D) Zinc

Correct Answer: A) Phosphorus

Explanation: Phosphorus is a key component of nucleic acids (DNA and RNA) and is vital for genetic material and energy transfer.

Question 12
Deficiency of which micronutrient can lead to the rosetting of leaves in plants?

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

Correct Answer: C) Boron

Explanation: Boron deficiency can cause rosetting in plants, affecting the growth of young tissues.

Question 13
Which of the following nutrients is primarily absorbed in its ionic form?

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

Correct Answer: C) Potassium

Explanation: Potassium is mostly absorbed by plants in its ionic form (K⁺) and plays a crucial role in various physiological processes.

Question 14
Which nutrient deficiency leads to the “whiptail” condition in cauliflower?

A) Manganese
B) Nitrogen
C) Boron
D) Calcium

Correct Answer: C) Boron

Explanation: Boron deficiency causes the “whiptail” condition in cauliflower, affecting leaf development.

Question 15
What effect does high phosphorus levels in the soil have on zinc availability?

A) Increases zinc availability
B) Decreases zinc availability
C) No effect
D) Completely replaces zinc

Correct Answer: B) Decreases zinc availability

Explanation: High phosphorus levels can inhibit the uptake of zinc due to competition and interactions in the soil.

Question 16
Which nutrient is necessary for the synthesis of certain plant hormones like auxins?

A) Boron
B) Calcium
C) Iron
D) Nitrogen

Correct Answer: A) Boron

Explanation: Boron is involved in the synthesis of plant hormones, particularly auxins, which regulate growth.

Question 17
Which nutrient deficiency causes stunted growth and poor root development?

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

Correct Answer: B) Phosphorus

Explanation: Phosphorus deficiency can significantly impact root development and overall plant growth.

Question 18
Which of the following is NOT considered a macronutrient?

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

Correct Answer: C) Iron

Explanation: Iron is a micronutrient, while nitrogen, potassium, and calcium are macronutrients needed in larger quantities.

Question 19
In plants, which mineral is essential for the regulation of osmotic pressure?

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

Correct Answer: B) Potassium

Explanation: Potassium is crucial for regulating osmotic pressure and maintaining turgor in plant cells.

Question 20
What is the main symptom of calcium deficiency in plants?

A) Leaf curl
B) Blossom end rot
C) Interveinal chlorosis
D) Stunted growth

Correct Answer: B) Blossom end rot

Explanation: Calcium deficiency in fruits, particularly tomatoes, leads to blossom end rot, where the bottom of the fruit rots.