NEET Biology Mineral Nutrition MCQs Set 09

Download NEET MCQs for NEET Biology: Mineral Nutrition

Access targeted multiple-choice questions for Mineral Nutrition designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Chapter-wise Objective Questions: Mineral Nutrition

View or download the dedicated Mineral Nutrition MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.

Multiple Choice Questions

Question 1: Necrosis in crops is due to the deficiency of
(a) Ca, K, S and Mo
(b) N, K, S and Mo
(c) N, S, Fe and Zn
(d) Mg, S, Mn and Ca
Show Answer & Explanation

Answer: (a) Ca, K, S and Mo

Explanation:
1. Necrosis in crops is due to deficiency of Ca, K, S, & Mo.

Question 2: Which of the following is not caused by deficiency of mineral nutrition?
(a) Etiolation
(b) Shortening of internode
(c) Necrosis
(d) Chlorosis
Show Answer & Explanation

Answer: (a) Etiolation

Explanation:
1. Yellowing of leaf due to absence of light is called etiolation.

Question 3: When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are
(a) Yellowish leaves
(b) Colourless petiole
(c) Dark green leaves
(d) Shoot apex die
Show Answer & Explanation

Answer: (a) Yellowish leaves

Explanation:
1. Mg deficiency causes chlorosis.

Question 4: The major portion of the dry weight of plants comprises of
(a) Nitrogen, phosphorus and potassium
(b) Calcium, magnesium and sulphur
(c) Carbon, nitrogen and hydrogen
(d) Carbon, hydrogen and oxygen
Show Answer & Explanation

Answer: (d) Carbon, hydrogen and oxygen

Explanation:
1. Carbon, hydrogen and oxygen are framework elements form 94% of dry weight of plants.

Question 5: Grey spots of oat are caused by deficiency of
(a) Cu
(b) Zn
(c) Mn
(d) Fe
Show Answer & Explanation

Answer: (c) Mn

Explanation:
1. Grey spot of oat are caused by deficiency of Mn.

Question 6: Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere?
(a) Anaerobic ammonium oxidation, and denitrification
(b) Aerobic nitrate oxidation, and nitrite reduction
(c) Decomposition of organic nitrogen, and conversion of dinitrogen to ammonium compounds
(d) Enteric fermentation in cattle, and nitrogen fixation by Rhizobium in root nodules of legumes
Show Answer & Explanation

Answer: (a) Anaerobic ammonium oxidation, and denitrification

Explanation:
1. NO3   N2   Dentrification NH3  NO2  NO3 i.e., Oxidation.

Question 7: In root nodules of legumes, leg-haemoglobin is important because it
(a) Transports oxygen to the root nodule
(b) Acts as an oxygen scavenger
(c) Provides energy to the nitrogen fixing bacterium
(d) Acts as a catalyst in transamination
Show Answer & Explanation

Answer: (b) Acts as an oxygen scavenger

Explanation:
1. LHb acts as an oxygen scavenger.

Question 8: Leghemoglobin is
(a) An oxygen carrier in human blood
(b) A protein used as food supplement
(c) An oxygen scavenger in root nodules
(d) A plant protein with high lysine content
Show Answer & Explanation

Answer: (c) An oxygen scavenger in root nodules

Explanation:
1. LHb is oxygen scavanger in root nodules.

Question 9: Which one of the following statements is correct?
(a) Legumes fix nitrogen only through the specialized bacteria that live in their roots
(b) Legumes fix nitrogen independently of the specialized bacteria that live in their roots
(c) Legumes fix nitrogen only through specialized bacteria that live in their leaves
(d) Legumes are incapable of fixing nitrogen
Show Answer & Explanation

Answer: (a) Legumes fix nitrogen only through the specialized bacteria that live in their roots

Explanation:
1. Legumes fix nitrogen only through specialised bacteria that live in their roots.

Question 10: Which one of the following mineral elements play an important role in biological nitrogen fixation ?
(a) Copper
(b) Manganese
(c) Zinc
(d) Molybdenum
Show Answer & Explanation

Answer: (d) Molybdenum

Explanation:
1. Mo-Fe Nitrogenase Fe.

Question 11: A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
(a) Tolypothrix
(b) Chlorella
(c) Nostoc
(d) Anabaena
Show Answer & Explanation

Answer: (d) Anabaena

Explanation:
1. Anabaena is a filamentous autotroph which found in symbiotic association with non legumes plants like Cycas and Azolla.

Question 12: If by radiation all nitrogenase enzyme are inactivated, then there will be no
(a) Fixation of nitrogen in legumes
(b) Fixation of atmospheric nitrogen
(c) Conversion from nitrate to nitrite in legumes
(d) Conversion from ammonium to nitrate in soil
Show Answer & Explanation

Answer: (a) Fixation of nitrogen in legumes

Explanation:
1. No fixation of nitrogen in legume because it occurs through nitrogenase enzyme.

Question 13: Roots of which plant contains a red pigment which have affinity for oxygen?
(a) Carrot
(b) Soyabean
(c) Mustard
(d) Radish
Show Answer & Explanation

Answer: (b) Soyabean

Explanation:
1. In legumes, root nodule contains a red or pink pigment called as leghaemoglobin.
2. It is an O2 scavenger.

Question 14: Assertion (A): Some mineral nutrients are essential.
Reason (R): They can be synthesized by the plants.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. First statement is right i.e., 17 essential elements are there, but second statement is wrong because these are not synthesized in the plant body but they are absorbed as mineral nutrients from soil, atmosphere etc.

Question 15: Assertion (A): Bacteria enters only the polyploid cells of root cortex.
Reason (R): These cells provide cytokinins to bacteria, that promotes bacteria cell division.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Bacterial cell enters only polyploid cells of root cortex and bacterial cells also provide/produce cytokinin that induces polyploidy.

Question 16: Assertion (A): Chelating agents used in improving availability of some minerals in soil are actually electron acceptors.
Reason (R): They increase solubility of some minerals in acidic soils.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (d) Both Assertion and Reason are false.

Explanation:
1. The agent which keeps metal in the soluble state is called chelating agents.

Question 17: Assertion (A): N, P, K are called critical elements.
Reason (R): They become deficient easily in soil due to leaching and higher requirement.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. N, P, K are critical elements because they are deficient in soil.

Question 18: Assertion (A): Influx of ions into inner space of cells is an active process.
Reason (R): Ions are available for free exchange in free space.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

Explanation:
1. Inward moment of ions is called influx but ions available for exchange is not reason.

Question 19: Assertion (A): Jar for nutrient solution culture contains a split cover with holes which hold a bent tube for aeration.
Reason (R): Regular aeration of culture solution is necessary for proper growth and activities of roots.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. Aeration tube help in aeration which is necessary for proper growth.

Question 20: Assertion (A): Ammonia is oxidised first to nitrate then to nitrite by the action of Nitrosomonas and Nitrobacter respectively.
Reason (R): Nitrite thus formed is absorbed by leaves.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (d) Both Assertion and Reason are false.

Explanation:
1. Nitrate formed is absorbed by plants and transported to leaves where reduced to form ammonia.

Question 21: Assertion (A): Soyabean export the fixed nitrogen as ureides.
Reason (R): Amides contain excess nitrogen and they are transported via phloem sieve tubes.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Transport occurs through xylem.

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Practice MCQs for NEET Biology Mineral Nutrition

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FAQs

Where can I access latest NEET Biology Mineral Nutrition MCQs Set 09?

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