MCQ Questions for Class 11 Biology: Ch 12 Mineral Nutrition

MCQ Questions for Class 11 Biology: Ch 12 Mineral Nutrition

1. Which one of the following is a wrong statement ?
(a) Greenhouse effect is a natural Phenomenon
(b) Eutrophication is a natural phenomenon in freshwater bodies
(c) Most of the forests have been lost in tropical areas
(d) Ozone in upper part of atmosphere is harmful to animals
► (d) Ozone in upper part of atmosphere is harmful to animals

2. That element which helps in electron transport in the process of photosynthesis
(a) Zinc
(b) Chlorine
(c) Manganese
(d) Boron
► (c) Manganese

3. Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition.
(a) Aspergillus
(b) Trichoderma
(c) Glomus
(d) Azotobacter
► (c) Glomus

4. Which one of the following is a micronutrient in plants?
(a) Potassium
(b) Magnesium
(c) Calcium
(d) Zinc
► (d) Zinc

5. Which is essential for root hair growth?
(a) Zn
(b) Mo
(c) Ca
(d) S
► (c) Ca

6. Which one of the following mineral elements plays an in biological nitrogen fixation?
(a) Copper
(b) Manganese
(c) Zinc
(d) Molybdenum
► (d) Molybdenum

7. Function of laghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
(a) Protect nitrogenase from Oxygen
(b) Transport Oxygen for nitrogenase activity
(c) Convert ammonium into nitrite
(d) Convert N2 to NH2
► (a) Protect nitrogenase from Oxygen

8. Those essential element which occur in 1-10 mg/g of dry matter are
(a) Macronutrients
(b) Micronutrients
(c) Toxic elements
(d) Beneficial nutrients
► (a) Macronutrients

9. The middle lamella mainly contains
(a) Na
(b) Mg
(c) K
(d) Ca
► (d) Ca

10. Nitrogenase enzyme converts
(a) Nitrate and nitrite into nitrogen
(b) Atmospheric nitrogen into ammonia
(c) Ammonia into nitrate and nitrite
(d) Nitrate into nitrite
► (b) Atmospheric nitrogen into ammonia

11. Deficiency of which of the following can cause yellowing of intravenous regions of leaves?
(a) Potassium
(b) Calcium
(c) Phosphorus
(d) Copper
► (a) Potassium

12. Choose the odd one out among the following
(a) Pseudomonas
(b) Rhizobium
(c) Azotobacter
(d) Bacillus anabaena
► (a) Pseudomonas

13. Phosphorous is a constituent of A.Cell membrane B.Nucleic acids C.cellwallD.chlorophyll
(a) C and D
(b) A and B
(c) B and C
(d) D and A
► (b) A and B

14. It is the technique of growing plants in above-ground strands provided with fine mist of normal solution.
(a) Chemoponics
(b) Hydroponics
(c) Hygroponics
(d) Aeroponics
► (d) Aeroponics

15. Minerals present in the soil are absorbed by
(a) stems
(b) leaf
(c) roots
(d) buds
► (c) roots

16. Non-symbiotic nitrogen fixing prokaryote is
(a) Frankia
(b) Acetobacter
(c) Rhizobium
(d) Azotobacter
► (d) Azotobacter

17. In cabbages, ‘Whiptail’ is a characteristic deficiency disease. It is caused by the deficiency of
(a) Chlorine
(b) Molybdenum
(c) Magnesium
(d) Boron
► (b) Molybdenum

18. Which among the following is NOT the source of nitrogen?
(a) Automobile exhaust
(b) Xylem
(c) Industrial combustion
(d) Forest fire
► (b) Xylem

19. Conversion of ammonia into nitrates through Nitrosomonas is called
(a) Nitrogen fixation
(b) Denitrification
(c) Ammonification
(d) Nitrification
► (d) Nitrification

20. The most abundant element found in plants is
(a) Carbon
(b) Manganese
(c) Nitrogen
(d) Iron
► (a) Carbon

21. Analysis of xylem sap shows
(a) presence of enzymes
(b) presence of organic matter
(c) presence of nutrients
(d) presence of mineral salts
► (d) presence of mineral salts

22. In plant, nitrate is reduced to ammonia state in two steps. In second step electrons are donated by
(a) Nitrite reductase
(b) Cytochrome b5
(c) Ferredoxin
(d) Nitrate reductase
► (c) Ferredoxin

23. Which one of the following organism help in absorption of phosphorus from soil by plants
(a) Glomus
(b) Frankia
(c) Rhizobium
(d) Anabaena
► (a) Glomus

24. Denitrification is carried out by
(a) Nitrosomonas
(b) Pseudomonas
(c) Nitrobacter
(d) Nitrococcus
► (b) Pseudomonas

25. The requirement of micro nutrient are always low if the concentration increases it leads to
(a) deficiency symptoms
(b) Cell differentiation
(c) Toxicity
(d) Cell elongation
► (c) Toxicity

26. An immobile element in plants is
(a) Calcium
(b) Potassium
(c) Nitrogen
(d) Phosphorus
► (a) Calcium

27. The enzyme involved in biological nitrogen fixation are
(a) Carboxylase
(b) Oxygenase
(c) Dehydrogenase
(d) Nitrogenase
► (d) Nitrogenase

28. The ion which activates many enzymes involved in photosynthesis,respiration, nitrogen metabolism is
(a) zinc ions
(b) manganous ions
(c) sodium ions
(d) potassium ions
► (b) manganous ions

29. Biological nitrogen fixation was discovered by
(a) Gericke
(b) Nehar and Sakmann
(c) Liebig
(d) Winograndsky
► (d) Winograndsky

30. Which of the following is not an essential element?
(a) Zinc
(b) Iodine
(c) Iron
(d) Manganese
► (b) Iodine

31. The nitrogen exists as two nitrogen atoms joined by
(a) Di covalent bonds
(b) tetra covalent bonds
(c) triple covalent bonds
(d) monocovalent bond
► (c) triple covalent bonds

32. Influx and efflux of H+ ions inside the cell change the
(a) Na+ ion concentration
(b) Nitrate concentration
(c) pH
(d) Permeability of plasma membrane
► (c) pH
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