NEET Biology Mineral Nutrition MCQs Set 03

Question: Hydroponics refers to growing plants in

• a) Solution of mineral nutrients
• b) Macronutrients culture medium
• c) Water
• d) Soil

Answer: Solution of mineral nutrients

Question: Select the incorrect statement w.r.t. criteria of essentiality of minerals

• a) Element must be replaceable by another element
• b) Element must be necessary for normal growth and reproduction
• c) Disorders caused by the absence/deficiency of an element can be corrected only by adding that specific element
• d) Element must be directly involved in plant metabolism

Answer: Element must be replaceable by another element

Question: How many elements have been found to be essential for plants?

• a) 17
• b) 9
• c) 60
• d) 18

Answer: 17

Question: The concentration of elements such as carbon and nitrogen in plants is

• a) Above 10 millimole kg^–1 of dry matter
• b) Equal to 10 millimole kg^–1 of dry matter
• c) Less than 10 millimole kg^–1 of dry matter
• d) Between 1–10 millimole kg^–1 of dry matter

Answer: Above 10 millimole kg^–1 of dry matter

Question: Which of the following is not essential for all plants?

• a) Co
• b) Mo
• c) Ni
• d) Mg

Answer:  Co

Question: A macronutrient is

• a) Magnesium
• b) Iron
• c) Zinc
• d) Manganese

Answer: Magnesium

Question: Select the odd one out from the following w.r.t. macronutrient

• a) Iron
• b) Phosphorus
• c) Nitrogen
• d) Sulphur

Answer: Iron

Question: Which of the following is a micronutrient?

• a) Ni
• b) Mg
• c) Ca
• d) K

Answer: Ni

Question: Which of the following is not a beneficial element?

• a) K
• b) Co
• c) Si
• d) Na

Answer: K

Question: Select incorrect statement w.r.t. micronutrients

• a) Involved in building of protoplasmic constituents
• b) Involved in activation of enzymes
• c) Become toxic in excess
• d) Concentration is less than 10 millimole kg^–1 of dry matter

Answer:  Involved in building of protoplasmic constituents

Question: Major function of trace elements is to act as

• a) Cofactor of enzymes
• b) Constituent of amino acids
• c) Constituent of hormones
• d) Constituent of chlorophyll

Answer: Cofactor of enzymes

Question: Select the incorrect match.

• a) Zn – Constituent of coenzyme A
• b) P – Component of ATP
• c) Ca – Synthesis of middle lamella
• d) Mn – Photolysis of water

Answer: Zn – Constituent of coenzyme A

Question: Element present in middle lamella is

• a) Ca
• b) K
• c) Cu
• d) Zn

Answer: Ca

Question: An element which helps in joining the subunits of ribosomes is

• a) Mg
• b) Ca
• c) K
• d) S

Answer: Mg

Question: Plants which are deficient in zinc will show reduction in the biosynthesis of

• a) Auxin
• b) Ferredoxin
• c) Ethylene
• d) Coenzyme A

Answer: Auxin

Question: Which of the following groups of elements are mobile?

• a) N, P, K
• b) Ca, Mg, S
• c) Ca, S, Fe
• d) Ca, N, P

Answer:  N, P, K

Question: The anion-cation balance in plant cells is due to essential element like

• a) Potassium
• b) Calcium
• c) Sodium
• d) Iron

Answer: Potassium

Question: Which enzyme is activated by zinc?

• a) Alcohol dehydrogenase
• b) Catalase
• c) Nitrate reductase
• d) Nitrogenase

Answer: Alcohol dehydrogenase

Question:  A macronutrient which is component of all organic compounds but is not a mineral element is

• a) C
• b) Mg
• c) P
• d) Fe

Answer: C

Question: Component of nitrogenase and nitrate reductase is

• a) Mo
• b) Mn
• c) Co
• d) N

Answer: Mo

More Questions.......................................

Question:  An immobile element present in plant tissues is

• a) Ca
• b) K
• c) P
• d) N

Answer: Ca

Question: The essential element that activates enzymes rubisco and pepco, also

• a) Needed in the activity of pyruvic acid decarboxylase
• b) Helps in carbohydrate translocation
• c) Essential for water splitting reactions
• d) Forms constituents of phytol tail of chlorophyll

Answer: Needed in the activity of pyruvic acid decarboxylase

Question: All are the elements whose deficiency symptoms first appear in the older tissues, except

• a) Calcium
• b) Potassium
• c) Magnesium
• d) Nitrogen

Answer: Calcium

Question: Amino acids like methionine and cysteine contain

• a) S
• b) B
• c) Cl
• d) Zn

Answer: S

Question: Which of the following is not a physiological role of potassium?

• a) Synthesize auxins
• b) Maintain turgidity of cells
• c) Maintain anion-cation balance in cells
• d) Help in opening and closing of stomata

Answer: Synthesize auxins

Question: An element involved in metabolism of urea is

• a) Ni
• b) Zn
• c) Si
• d) Na

Answer: Ni

Question: Deficiency symptoms of an element tend to appear first in young leaves. It indicates that element is relatively immobile. Which one of the following elemental deficiencies would show such symptoms?

• a) S
• b) Mg
• c) N
• d) K

Answer: S

Question: Plants absorb zinc as

• a) Zn²⁺
• b) ZnSO₄
• c) Zn
• d) Zm

Answer: Zn²⁺

Question: Mineral present in cytochrome is commonly

• a) Fe
• b) Mn
• c) Mo
• d) Mg

Answer:  Fe

Question: An element essential for nitrogen metabolism is

• a) Mo
• b) Mg
• c) Mn
• d) K

Answer: Mo

Question: Boron takes part in

• a) Transport of carbohydrates through phloem
• b) Photosynthesis
• c) Activation of enzymes involved in respiration
• d) Nitrogen metabolism

Answer: Transport of carbohydrates through phloem

Question: Mark the correct sequence of steps for the development of root nodules in legumes

a. Formation of infection thread.
b. Division of cortical and pericyclic cells.
c. Curling of root hairs.
d. Leghaemoglobin synthesis.

• a) c, a, b, d
• b) c, b, a, d
• c) b, d, a, c
• d) a, c, b, d

Answer:  c, a, b, d

Question: Which group of micronutrients is required for mitochondrial and photosynthetic electron transport?

• a) Cu, Fe
• b) Co, Ni
• c) N, P, K
• d) Ca, K, Na

Answer:  Cu, Fe

Question: Death of leaf tissues in plants is caused by deficiency of

• a) Ca and Mg
• b) Zn and S
• c) Mo and S
• d) Mo and C

Answer: Ca and Mg

Question: 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

Answer: N, K, S

Question:  A prokaryote responsible for converting ammonia to nitrites is

• a) Nitrosomonas
• b) Nitrobacter
• c) Nitrocystis
• d) Rhizobium

Answer: Nitrosomonas

Question: The free living, aerobic and saprotrophic N₂-fixing microbe is

• a) Azotobacter
• b) Rhodospirillum
• c) Rhizobium
• d) Anabaena

Answer:  Azotobacter

Question: How many ATP are required for the formation of one molecule of NH₃ by the nitrogenase enzyme?

• a) Eight
• b) Twelve
• c) Sixteen
• d) Six

Answer: Eight

Question: Non-symbiotic nitrogen fixing prokaryote is

• a) Azotobacter
• b) Acetobacter
• c) Rhizobium
• d) Frankia

Answer: Azotobacter

Question:  Amides are transported to the other parts of plant through

• a) Xylem
• b) Cyclosis and active transport
• c) Phloem
• d) Parenchyma

Answer: Xylem

Question: Enzyme nitrogenase is

• a) Found in prokaryotes only
• b) A Cu-Fe protein
• c) An O₂ requiring enzyme
• d) None of these

Answer:  Found in prokaryotes only

Question: Pigment leghaemoglobin is present in the roots of

• a) Alfalfa
• b) Potato
• c) Rice
• d) Maize

Answer: Alfalfa

Question: 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

Answer: Nitrogenase may require oxygen for its functioning

Question: The function of amides is all, except

• a) Part of functional proteins
• b) Storage of excess nitrogen
• c) Structural part of plant proteins
• d) Transport of nitrogen

Answer: Part of functional proteins

Question: Which of the following is an amide involved in nitrogen metabolism by plants?

• a) Asparagine
• b) Serine
• c) Cysteine
• d) Glutamate

Answer: Asparagine

Question: Growing plants in a nutrient solution

• a) Requires prevention of reaction of light with roots
• b) Also allows growth of algae in containers
• c) Was first demonstrated by Arnon and Hoagland
• d) Involves use of chelating agent Na-EDTA to keep iron unavailable to plants

Answer:  Requires prevention of reaction of light with roots

Question: Which is not a criteria for essentiality of a mineral?

• a) Dispensible for growth
• b) Requirement is specific
• c) Direct role in metabolism
• d) Deficiency causes hunger signs

Answer: Dispensible for growth

Question: Which is not a true statement regarding macronutrients?

• a) Usually become toxic in excess
• b) Develop osmotic potential
• c) Forms plant structure
• d) No role in electron transfer

Answer: Usually become toxic in excess

Question: Choose correct statement regarding micronutrients

• a) Both
• b) Little role in protoplasmic structure
• c) Become toxic in excess
• d) None of these

Answer: Both

Question: Deficiency of which element causes deficiency of nitrogen

• a) Mo
• b) K
• c) Mn
• d) S

Answer: Mo

Question: Minerals associated with redox reactions are

• a) Fe, Cu
• b) Fe, K
• c) Mn, Mo
• d) N, Cu

Answer: Fe, Cu

Question: Minerals which maintain cation - anion balance in cells are

• a) Cl, K
• b) Fe, Cu
• c) K, P
• d) Ca, Fe

Answer:  Cl, K

Question: Which of the following groups of elements are mobile?

• a) Cl, K
• b) B, K, N
• c) Ca, Mg, P
• d) Fe, Ca, B

Answer: Cl, K

Question: 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

Answer: Fe and Mg

Question:  If chloroplast is burnt, then which of the following is left?

• a) Magnesium
• b) Manganese
• c) Iron
• d) Sulphur

Answer: Magnesium