NEET Biology Mineral Nutrition MCQs Set 06

Practice MCQs for NEET Biology Mineral Nutrition

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Multiple Choice Questions

Question 1: Which group of micronutrients is required for mitochondrial and photosynthetic electron transport?
(a) Ca, K, Na
(b) Cu, Fe
(c) Co, Ni
(d) N, P, K
Show Answer & Explanation

Answer: (b) Cu, Fe

Explanation:
1. Cu used in complex IV  Cu+ to Cu2+.

Question 2: Match the following and choose the correct combination from the options given.<br />Column I Column II<br />a. Potassium (i) Germination of pollen grains<br />b. Molybdenum (ii) Involved in synthesis of auxin<br />c. Boron (iii) Involved in stomatal movement<br />d. Zinc (iv) Constituent of ferredoxin<br />e. Sulphur (v) Component of nitrate reductase
(a) a(iii), b(iv), c(ii), d(i), e(v)
(b) a(iii), b(v), c(i), d(ii), e(iv)
(c) a(i), b(ii), c(iii), d(iv), e(v)
(d) a(ii), b(iii), c(v), d(i), e(iv)
Show Answer & Explanation

Answer: (b) a(iii), b(v), c(i), d(ii), e(iv)

Explanation:
1. Potassium helps in the opening and closing of stomata, Molybdenum in nitrogen fixation, Boron in germination of pollen grains.

Question 3: Deficiency of which group of elements can cause inhibition of cell division in plants?
(a) N, K, S
(b) Mg, Cu, P
(c) Ca, Mg, Cu
(d) N, K, Ca
Show Answer & Explanation

Answer: (a) N, K, S

Explanation:
1. N, K & S causing stunted growth due to inhibition of cell division.

Question 4: Mark the correct sequence of steps for the development of root nodules in legumes<br />a. Formation of infection thread.<br />b. Division of cortical and pericyclic cells.<br />c. Curling of root hairs.<br />d. Leghaemoglobin synthesis.
(a) a, c, b, d
(b) b, d, a, c
(c) c, b, a, d
(d) c, a, b, d
Show Answer & Explanation

Answer: (d) c, a, b, d

Explanation:
1. First curling of root hairs Formation of infectious thread Division of cortical and pericycle cells Leghaemoglobin synthesis for acting as oxygen scavanger.

Question 5: A prokaryote responsible for converting ammonia to nitrites is
(a) Nitrosomonas
(b) Nitrobacter
(c) Nitrocystis
(d) Rhizobium
Show Answer & Explanation

Answer: (a) Nitrosomonas

Explanation:
1. Nitrosomonas  2NO2  2H  2H2O  Energy 2NH3  3O2 .

Question 6: Conversion of NH3  NO2–  NO3– is called
(a) Ammonification
(b) Nitrification
(c) Denitrification
(d) Biological N2-fixation
Show Answer & Explanation

Answer: (b) Nitrification

Explanation:
1. Conversion of ammonia into nitrate is called nitrification.

Question 7: Reaction carried out by N2 metabolising microbes include<br />I. 2NH3 + 3O2  2NO2– + 2H+ + 2H2O<br />II. 2NO2– + O2  2NO3– Which of the following statements about these equations is not true?
(a) Step I is carried out by Nitrosomonas or Nitrococcus
(b) Step II is carried out by Nitrobacter
(c) Both steps I and II can be called nitrification
(d) Bacteria carrying out these steps are usually photoautotrophs
Show Answer & Explanation

Answer: (d) Bacteria carrying out these steps are usually photoautotrophs

Explanation:
1. Bacteria carrying out these steps may not be photoautotrophic.

Question 8: How many ATP are required for the formation of one molecule of NH3 by the nitrogenase enzyme?
(a) Six
(b) Eight
(c) Twelve
(d) Sixteen
Show Answer & Explanation

Answer: (b) Eight

Explanation:
1. N2  8e   8H  16ATP  2NH3  H2  16ADP  16Pi 16  2NH3 8  1NH3.

Question 9: Non-symbiotic nitrogen fixing prokaryote is
(a) Frankia
(b) Azotobacter
(c) Acetobacter
(d) Rhizobium
Show Answer & Explanation

Answer: (b) Azotobacter

Explanation:
1. Azotobacter is a free living, aerobic, saprophytic bacteria.

Question 10: Amides are transported to the other parts of plant through
(a) Phloem
(b) Xylem
(c) Parenchyma
(d) Cyclosis and active transport
Show Answer & Explanation

Answer: (b) Xylem

Explanation:
1. The symbiotic Nitrogen-fixing prokaryotes release ammonia that, to avoid toxicity, must be rapidly converted into organic forms in the root nodules before being transported to shoot via xylem e.g., amides, ureids.

Question 11: Enzyme nitrogenase is
(a) A Cu-Fe protein
(b) Found in prokaryotes only
(c) An O2 requiring enzyme
(d) Essential to convert NO2– to NO3–
Show Answer & Explanation

Answer: (b) Found in prokaryotes only

Explanation:
1. Nitrogenase is found only in prokaryotes not in eukaryotes.

Question 12: The given equation refers to N2 + 8e– + 8H+ + 16ATP  2NH3 + H2 + 16ADP + 16Pi
(a) Ammonification
(b) Nitrification
(c) Denitrification
(d) Nitrogen fixation
Show Answer & Explanation

Answer: (d) Nitrogen fixation

Explanation:
1. Conversion of nitrogen into ammonia is known as nitrogen fixation.

Question 13: Select the incorrect statement with respect to the biological nitrogen fixation by Rhizobium
(a) Nitrogenase may require oxygen for its functioning
(b) Nitrogenase is Mo-Fe protein
(c) Leg-haemoglobin is a pink-coloured pigment
(d) Nitrogenase helps to convert N2 gas into two molecules of ammonia
Show Answer & Explanation

Answer: (a) Nitrogenase may require oxygen for its functioning

Explanation:
1. Nitrogenase works in anaerobic condition.

Question 14: The function of amides is all, except
(a) Part of functional proteins
(b) Structural part of plant proteins
(c) Storage of excess nitrogen
(d) Transport of nitrogen
Show Answer & Explanation

Answer: (a) Part of functional proteins

Explanation:
1. It is not the part of functional proteins.

Question 15: Which of the following is an amide involved in nitrogen metabolism by plants?
(a) Glutamate
(b) Cysteine
(c) Serine
(d) Asparagine
Show Answer & Explanation

Answer: (d) Asparagine

Explanation:
1. Aspargine and glutamine is an amide involved in nitrogen metabolism by plants.

Question 16: Growing plants in a nutrient solution
(a) Involves use of chelating agent Na-EDTA to keep iron unavailable to plants
(b) Was first demonstrated by Arnon and Hoagland
(c) Also allows growth of algae in containers
(d) Requires prevention of reaction of light with roots
Show Answer & Explanation

Answer: (d) Requires prevention of reaction of light with roots

Explanation:
1. This is so because in hydroponic we just wanted roots to be immersed in nutrient solution and want to grow them using it.

Question 17: Which is not a criteria for essentiality of a mineral?
(a) Direct role in metabolism
(b) Requirement is specific
(c) Deficiency causes hunger signs
(d) Dispensible for growth
Show Answer & Explanation

Answer: (d) Dispensible for growth

Explanation:
1. It is indispensible for growth.

Question 18: Which is not a true statement regarding macronutrients?
(a) Forms plant structure
(b) Usually become toxic in excess
(c) No role in electron transfer
(d) Develop osmotic potential
Show Answer & Explanation

Answer: (b) Usually become toxic in excess

Explanation:
1. No, they are not toxic in excess, micronutrients are toxic in excess.

Question 19: Choose correct statement regarding micronutrients
(a) Become toxic in excess
(b) Little role in protoplasmic structure
(c) No role in enzyme activation
(d) Both (1) & (2)
Show Answer & Explanation

Answer: (d) Both (1) & (2)

Explanation:
1. Micronutrients become toxic in excess and they have little role in protoplasmic structure.
2. Therefore, both (1) and (2).

Question 20: Minerals which maintain cation - anion balance in cells are
(a) Cl, K
(b) Fe, Cu
(c) K, P
(d) Ca, Fe
Show Answer & Explanation

Answer: (a) Cl, K

Explanation:
1. K & Cl are maintain cation-anion balance.

Question 21: Which of the following elements are required for chlorophyll synthesis?
(a) Fe and Mg
(b) Mo and Ca
(c) Cu and Ca
(d) Ca and K
Show Answer & Explanation

Answer: (a) Fe and Mg

Explanation:
1. Fe and Mg Mg present in ring of chlorophyll.

Question 22: If chloroplast is burnt, then which of the following is left?
(a) Magnesium
(b) Manganese
(c) Iron
(d) Sulphur
Show Answer & Explanation

Answer: (a) Magnesium

Explanation:
1. Magnesium is chleated in pyrrole ring.

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