NEET Biology Mineral Nutrition MCQs Set 07

Biology Objective Questions and Answers: Mineral Nutrition

Review structured MCQ sets for NEET Biology Mineral Nutrition. Built according to official NEET guidelines, these downloadable questions support daily revision and core concept reinforcement.

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Multiple Choice Questions

Question 1: Which is not a trace element?
(a) Mn
(b) Cu
(c) Mo
(d) K
Show Answer & Explanation

Answer: (d) K

Explanation:
1. Potassium is a macronutrient.

Question 2: Find odd one (w.r.t. critical element)
(a) Nitrogen
(b) Potassium
(c) Nickel
(d) Phosphorus
Show Answer & Explanation

Answer: (c) Nickel

Explanation:
1. The elements mostly deficient in soil is called as critical elements like N, P & K.

Question 3: Tryptophan synthesis, carboxylase activity and little leaf of plants are all associated with
(a) Zn
(b) B
(c) Ca
(d) Cu
Show Answer & Explanation

Answer: (a) Zn

Explanation:
1. These all are associated with Zn i.e., Tryptophan synthesis carboxylase activity and little leaf of plants.

Question 4: Hunger signs in plants are
(a) Symptoms due to lesser water absorption in plants
(b) Symptoms due to poor photosynthesis in plants
(c) Deficiency symptoms of mineral nutrients
(d) Symptoms due to excess water absorption in plants
Show Answer & Explanation

Answer: (c) Deficiency symptoms of mineral nutrients

Explanation:
1. It occurs due to deficiency symptoms of mineral nutrients.

Question 5: (a) Moderate decrease or increase of micronutrients causes deficiency and toxicity symptoms respectively.<br />(b) Excess of manganese causes toxicity of iron, calcium and molybdenum.<br />(c) A macronutrient is said to be toxic when present below a critical concentration.
(a) Only (a) is correct
(b) Only (b) is correct
(c) (b) & (c) are correct
(d) (a) & (c) are correct
Show Answer & Explanation

Answer: (a) Only (a) is correct

Explanation:
1. This option, Only (a) is correct, is the one that agrees with the standard NCERT facts for this topic.

Question 6: Essential elements are :
(a) Only micronutrients
(b) Only macronutrients
(c) C, H, O & N only
(d) Both macro and micronutrients
Show Answer & Explanation

Answer: (d) Both macro and micronutrients

Explanation:
1. Both macro and micronutrients.

Question 7: Movement of electrolytes through the roots is generally
(a) Against electro chemical gradient and require energy
(b) Along electro chemical gradient and does not require energy
(c) A passive process
(d) Dependent on aquaporins
Show Answer & Explanation

Answer: (a) Against electro chemical gradient and require energy

Explanation:
1. Movement of electrolytes through roots is generally against electro-chemical gradient and require energy.
2. Because, it is an active process.

Question 8: The translocation of solute is
(a) Equal to the rate of translocation of water
(b) Dependent on transpiration pull
(c) Through xylem vessel
(d) All of these
Show Answer & Explanation

Answer: (d) All of these

Explanation:
1. Translocation of solute i.e., minerals is by xylem through xylem vessels through transpiration pull.

Question 9: Process of nitrification and nitrate assimilation are
(a) Oxidation & reduction respectively
(b) Reduction & oxidation respectively
(c) Both are oxidation
(d) Both are reduction
Show Answer & Explanation

Answer: (a) Oxidation & reduction respectively

Explanation:
1. Oxidation and Reduction respectively.
2. NH3 NH–2 NH–3 –3 –5 –7 Oxidation Reduction.

Question 10: Most common form of nitrogen uptake and usable forms for plants are respectively
(a) NO3–; NO2–
(b) NH3 ; NO3–
(c) NO3–; NH3
(d) NH3 ; NO2–
Show Answer & Explanation

Answer: (c) NO3–; NH3

Explanation:
1. NO3 is form in which nitrogen is mainly absorbed.
2. NH3 is usable form for plants.

Question 11: Which of the following is/are diazotrophs?
(a) Rhizobium and Azotobacter
(b) Frankia and Klebsiella
(c) Anabaena and Nostoc
(d) All of these
Show Answer & Explanation

Answer: (d) All of these

Explanation:
1. Rhizobium, Azotobacter, Franka, Klebsiella, Anabaena and Nostoc, these all are diazotrophs i.e., organisms that fix atmospheric nitrogen into usable form.

Question 12: Which is not true for nitrogenase enzyme in root nodules in legumes?
(a) Synthesized by nif genes of Rhizobium
(b) Site of reduction of N2 into NH3
(c) It is a Mo-F protein
(d) Resistant to O2 conc.
Show Answer & Explanation

Answer: (d) Resistant to O2 conc.

Explanation:
1. It is not resistant to oxygen concentration.
2. Oxygen concentration is toxic to Nitrogenase enzyme.

Question 13: Leghemoglobin is found in which one of the following organisms?
(a) Anthoceros
(b) Aulosira
(c) Nostoc
(d) Groundnut
Show Answer & Explanation

Answer: (d) Groundnut

Explanation:
1. Leghemoglobin is found in groundnut.

Question 14: Cycas and Azolla plants are associated with
(a) Bacillus
(b) Klebsiella
(c) Anabaena
(d) Rhizobium
Show Answer & Explanation

Answer: (c) Anabaena

Explanation:
1. Cycas and Azolla plants are associated with Anabaena.

Question 15: Nitrogenase enzyme found in root nodules in legumes contains
(a) Mo, Mn, S
(b) Co, Mo, Ca
(c) Mo, Fe, S
(d) Mo, B, S
Show Answer & Explanation

Answer: (c) Mo, Fe, S

Explanation:
1. Mo, Fe, S.

Question 16: Transported and storage form of nitrogen in plants are
(a) Amides
(b) Polypeptides
(c) Amino acids
(d) -ketoglutaric acids
Show Answer & Explanation

Answer: (a) Amides

Explanation:
1. Amides and ureids are transported through xylem.

Question 17: Ureides are preferred forms for storage and transport of nitrogen in
(a) Triticum aestivum
(b) Solanum nigrum
(c) Glycine max
(d) Allium cepa
Show Answer & Explanation

Answer: (c) Glycine max

Explanation:
1. Glycine i.e., Soyabean Others are Kidney pea, Peanut, Souther pea.

Question 18: Which of the following elements is responsible for maintaining turgor in cells?
(a) Magnesium
(b) Sodium
(c) Calcium
(d) Potassium
Show Answer & Explanation

Answer: (d) Potassium

Explanation:
1. Potassium helps in maintaining turgidity of cells.

Question 19: Which is essential for the growth of root tip?
(a) Zn
(b) Fe
(c) Ca
(d) Mn
Show Answer & Explanation

Answer: (c) Ca

Explanation:
1. Calcium is required by dividing and differentiating cells.

Question 20: During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by :
(a) Cytochrome
(b) Leghaemoglobin
(c) Xanthophyll
(d) Carotene
Show Answer & Explanation

Answer: (b) Leghaemoglobin

Explanation:
1. This option, Leghaemoglobin, is the one that agrees with the standard NCERT facts for this topic.

Question 21: Minerals known to be required in large amounts for plant growth include
(a) Magnesium, sulphur, iron, zinc
(b) Phosphorus, potassium, sulphur, calcium
(c) Calcium, magnesium, manganese, copper
(d) Potassium, phosphorus, selenium, boron
Show Answer & Explanation

Answer: (b) Phosphorus, potassium, sulphur, calcium

Explanation:
1. Macronutrients are required in large amounts for plant growth.

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FAQs

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