CBSE Class 11 Biology Mineral Nutrition MCQs Set B

Question: Minerals known to be required in large amounts for plant growth include
a) potassium, phosphorus, selenium, boron
b) magnesium, sulphur, iron, zinc
c) phosphorus, potassium, sulphur, calcium
d) calcium, magnesium, manganese, copper.
Answer: c

Question: Deficiency symptoms of nitrogen and potassium are visible first in
a) senescent leaves
b) young leaves
c) roots
d) buds.
Answer: a

Question: In which of the following forms is iron absorbed by plants?
a) Ferric
b) Ferrous
c) Free element
d) Both ferric and ferrous
Answer: a

Question: The primary acceptor, during CO2 fixation in C3 plants, is
a) phosphoenolpyruvate (PEP)
b) ribulose 1, 5-diphosphate (RuDP)
c) phosphoglyceric acid (PGA)
d) ribulose monophosphate (RMP).
Answer: b

Question: Sulphur is an important nutrient for optimum growth and productivity in
a) oilseed crops
b) pulse crops
c) cereals
d) fibre crops.
Answer: a

Question: A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation.In which of the following physiological groups would you assign this plant?
a) CAM
b) Nitrogen fixer
c) C3
d) C4
Answer: d

Question: A plant requires magnesium for
a) protein synthesis
b) chlorophyll synthesis
c) cell wall development
d) holding cells together.
Answer: b

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

Question: In which of the following all three are macronutrients?
a) Molybdenum, magnesium, manganese
b) Nitrogen, nickel, phosphorus
c) Boron, zinc, manganese
d) Iron, copper, molybdenum
Answer: b

Question: The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
a) Magnesium and Molybdenum
b) Magnesium and Chlorine
c) Manganese and Chlorine
d) Manganese and Potassium
Answer: c

Question: A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?
a) Mutated
b) Embolised
c) Etiolated
d) Defoliated
Answer: c

Question: Which of the following elements is a constituent of biotin?
a) Magnesium
b) Calcium
c) Phosphorus
d) Sulphur
Answer: d

Question: Roots of which plant contains a red pigment which have affinity for oxygen?
a) Carrot
b) Soybean
c) Mustard
d) Radish
Answer: b

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

Question: Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
a) Application of iron and magnesium to promote synthesis of chlorophyll
b) Frequent irrigation of the crop
c) Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
d) Removal of all yellow leaves and spraying the remaining green leaves with 2, 4,5-trichlorophenoxy acetic acid
Answer: a

Question: CAM helps the plants in
a) conserving water
b) secondary growth
c) disease resistance
d) reproduction.
Answer: a

Question: Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
a) Crotalaria juncea
b) Cycas revoluta
c) Cicer arietinum
d) Casuarina equisetifolia
Answer: d

Question: 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.
Answer: a

Question: Which one of the following elements is not an essential micronutrient for plant growth?
a) Zn
b) Cu
c) Ca
d) Mn
Answer: c

Question: Enzyme first used for nitrogen fixation
a) nitrogenase
b) nitroreductase
c) transferase
d) transaminase.
Answer: a

Question: Which of the following is free-living aerobic nonphotosynthetic nitrogen-fixing bacterium?
a) Nostoc
b) Azospirillum
c) Rhizobium
d) Azotobacter
Answer: d

Question: A non-photosynthetic aerobic nitrogen fixing soil bacterium is
a) Rhizobium
b) Clostridium
c) Azotobacter
d) Klebsiella.
Answer: c

Question: Gray spots of oat are caused by deficiency of
a) Cu
b) Zn
c) Mn
d) Fe.
Answer: c

Question: Best defined function of manganese in green plants is
a) photolysis of water
b) Calvin cycle
c) nitrogen fixation
d) water absorption.
Answer: a

Question: Boron in green plants assists in
a) activation of enzymes
b) acting as enzyme co-factor
c) photosynthesis
d) sugar transport.
Answer: d

Question: Which one of the following is not a micronutrient?
a) Molybdenum
b) Magnesium
c) Zinc
d) Boron
Answer: b

Question: Manganese is required in
a) plant cell wall formation
b) photolysis of water during photosynthesis
c) chlorophyll synthesis
d) nucleic acid synthesis.
Answer: b

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

Question: Which one of the following is wrong statement?
a) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also.
b) Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
c) Phosphorus is a constituent of cell membranes,certain nucleic acids and all proteins.
d) Nitrosomonas and Nitrobacter are chemoautotrophs.
Answer: c

Question: For its action, nitrogenase requires
a) high input of energy
b) light
c) Mn2+
d) super oxygen radicals.
Answer: a

Question: Mg is a component of
a) chlorophyll
b) cytochrome
c) haemoglobin
d) haemocyanin.
Answer: a

Question: Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes?
a) Zn
b) Mn
c) K
d) Mg
Answer: c

Question: The carbon dioxide acceptor in Calvin cycle/C3-plants is
a) phosphoenol pyruvate (PEP)
b) ribulose 1, 5-diphosphate (RuDP)
c) phosphoglyceric acid (PGA)
d) ribulose monophosphate (RMP).
Answer: b

Question: Plants take zinc in the form of
a) ZnSO₄
b) Zn++
c) ZnO
d) Zn.
Answer: b

Question: 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.
Answer: a

Question: Which one of the following elements in plants is not remobilised?
a) Phosphorus
b) Calcium
c) Potassium
d) Sulphur
Answer: b

Question: Which one of the following is not an essential mineral element for plants while the remaining three are?
a) Iron
b) Manganese
c) Cadmium
d) Phosphorus
Answer: c

Question: Which one of the following elements is almost nonessential for plants?
a) Zn
b) Na
c) Ca
d) Mo
Answer: b

Question: The deficiencies of micronutrients, not only affect growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow.Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?
a) Co, Ni, Mo
b) Ca, K, Na
c) Mn, Co, Ca
d) Cu, Mn, Fe
Answer: d

Question: What will be the number of Calvin cycles to generate one molecule of hexose?
a) 8
b) 9
c) 4
d) 6
Answer: d

Question: Bundle sheath cells
a) are rich in PEP carboxylase
b) lack RuBisCO
c) lack both RuBisCO and PEP carboxylase
d) are rich in RuBisCO.
Answer: d

Question: Which of the following elements plays an important role in biological nitrogen fixation?
a) Copper
b) Molybdenum
c) Zinc
d) Manganese
Answer: b

Question: Mineral associated with cytochrome is
a) Cu
b) Mg
c) Cu and Mg
d) Fe.
Answer: d

Question: An element playing important role in nitrogen fixation is
a) molybdenum
b) copper
c) manganese
d) zinc.
Answer: a

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

Question: Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as
a) neutral ions
b) negatively charged ions
c) positively charged ions
d) both positively and negatively charged but disproportionate mixture.
Answer: b