MCQ Mineral Nutrition

 



MCQ  MINERAL NUTRITION 

1. Nodule formation  is reduced in legume roots due to the deficiency  of 

(1) Chlorine              (2) Boron 

(3) Sulphur               (4) (2) and (3) 

Answer  (4) 

 2. On earth the largest reservoir  of nitrogen is 

(1) the oceans          (2) Granite rocks 

(3) The air                (4) The soil 

Answer (3) 

 3. Organisms  that fix nitrogen in aquatic habitats  are 

(1) Green algae        (2)  Cyanobacteria  

(3) Brown algae      (4)  Protozoa 

Answer (2) 

 4.  In roots nodules of leguminous plants, the pigment  leghaemoglobin   that gives pink colour to the nodules, is present in the 

(1) Intercellular  spaces 

(2) Cytosol of bacteroids 

(3) inside the bacterial wall 

(4) outside the peribacterial space in the cytosol of nodule cells. 

Answer (4) 


5.   Besides providing  pink colour to the root nodules, leghaemoglobin  performs the function of 

(1) protecting enzyme  nitrogenase from free oxygen 

(2) Transporting nitrogen to host cells 

(3) Protecting bacteroids from the enzymes of host cell 

(4) protecting leakage of fixed  nitrogen to the soil atmosphere  

Answer  (1) 

6.  Major nitrogen  fixation is carried out by 

(1)  Lightning  

(2) Chemical industries 

(3) Sgmbiotic bacteria  

(4) Leaching 


Answer (3)

7.  Which one plays an important  role in energy metabolism ?

(1) Calcium              (2) Sodium  

(3) Sulphur             (4) Phosphorus  

Answer (4) 

8. Most of the plants obtain nitrogen from the soil in the form of 

(1) Nitrites and molecular  nitrogen 

(2) Nitrates  and  ammonium  salts 

(3) Nitrites  and ammonium  salts 

(4) Hyponitrites  and  nitrates 

Answer (2) 

 9.  Deficiency  of nitrogen produces 

(1) Biossom  end  root of tomato 

(2) Chlorosis 

(3) Die back disease  

(4) Reduced respiration  

Answer (2) 

10. Plants absorb sulphur  in the form of 

(1) SO2 from soil       (2) SO2 from air 

(3) Both (1) and (2)     (4) SO3 from soil 

Answer (2) 

 11.  Which of the following  is a micronutrient?

(1) Mg             (2) Zu      (3) Ca      (4) P 

Answer (2) 

12.  Which of the following  is not an essential  micronutrient? 

(1) Boron                  (2) Sodium  

(3) Manganese         (4) Molybdenum  

Answer (2) 

13. Which one of the following  elements  is not required  by plants for their healthy  normal growth ? 

(1) Calcium            (2) Magnesium  

(3) Lead                    (4) Iron 

Answer (3) 

14.  Carbon becomes available  to crop plants in the form of 

(1) Amino  acids        (2) Carbknates 

(3) Carbon    dioxide     (4) Element carbon 

Answer (3) 

15. On the basis of symptoms  of chlorosis in leaves, a  student inferred  that this was due to deficiency  of nitrogen . This inference could be correct  only if we assume that yellowing of leaves appeared  first  in 

(1) Old  leaves           (2) Young leaves 

(3) Mature leaves followed by young leaves 

(4) Young leaves followed by mature leaves 

Answer (1) 

 16. Fertilizers are usually  enriched in NPK which  denotes 

(1) Iron, manganese  and zinc 

(2) Nitrogen, phosphorus   and zinc 

(3) Calcium and boron 

(4) Nitrogen , phosphorus  and potassium  

Answer (4)

 17.  Which  one is a component of ferredoxin?

(1) Zu        (2 ) Mn         (3) Cu          (4)Fe 

Answer (4)

18.  Potassium  is involved  in 

(1) Photosynthesis  

(2)  Promoting many enzymatic activities  that regulate  plant processes  

(3) Providing reddish pigmentation  to fruits 

(4) Formation of vascular  cambium 

Answer (2) 

19.  The deficiency  syndrome  of phosphorus  is 

(1) Iodging of cereals 

(2) Leaf curl 

(3) Stunted  growth 

(4) Wrinkling  of grains 

Answer (3) 

20.  Due to deficiency  of phosphorus  

(1) The rate of protein synthesis  is increased  

(2) The  rate of protein synthesis  is decreased  

(3) There  is no effect on the rate of protein synthesis 

(4) The rate of protein synthesis  initially  declines but increases later on 

Answer (2) 

21. In plants a common symptom   caused by deficiency  of P  K, Ca and Mg is 

(1) Bending of leaf  tips 

(2) Formation  of anthocyanin 

(3) Poor development  of vasculature 

(4) Chlorosis 

Answer (4) 

 22. Pungent principlea sinigrin, of crucifers is a 

(1) Glycoside having sulphur 

(2) Glycoside having cyanide 

(3) Glycoside having  special amino  acids  

(4) Tannin 

Answer 1) 

23.  A sulphur containing  amino acid is 

(1) Methionine      (2)  asparagine 

(3) Serine               (4)  Proline 

Answer (1) 

24. Calcium  is mainly a component  of 

(1) Primary   walls     (2) Secondary   wall

(3) Chlorophyll          (4) Middle lamella 

Answer (4)

 25. White _ bud  condition  in maize is produced due to the deficiency  of 

(1) Iron                 (2) Molybdenum 

(3) Zinc                (4) Boron 

Answer (3) 

26. Deficiency  of molybdenum causes 

(1) Poor  development  of vasculature  

(2) Bending  of leaf tip 

(3) Brown  heart of turnip 

(4) Mottling  & marginal necrosis of leaves 

Answer (4)

 27.  In crucifers whiptail disease  is caused due to the deficiency  of 

(1) Manganese       (2) Magnesium  

(3)  Molybdenum    (4) Iron 

Answer (3)

28. Which of the following  microelements  is related to the synthesis  of plant auxin ( IAA) ?

(1) Molybdenum        (2) Chlorine 

(3) Zinc                         (4) Boron 

Answer (3) 

 29.  Reclamation  disease  of cereals and legumes  is caused by the deficiency  of 

(1) Manganese          (2) Phosphorus 

(3) Copper               (4) Boron 

Answer (3)

30. Death of stem and root tips occurs due to the deficiency  of 

(1) Phosphorus      (2) Nitrogen 

(3) Calcium             (4) Carbon 

Answer (3) 

 31.  Mineral are absorbed by the roots from the soil in the form of 

(1) Compounds 

(2) Very concentrated solution  

(3) in the form of ions 

(4) in the form of molecules. 

Answer (3) 

32.  A plant requires calcium  for 

(1) Holding  its cells together  

(2) Synthesizing  chlorophyll 

(3) Photolysis  of water 

(4 ) Opening  and closing  its stomata 

Answer (1) 

33.  K+ ions control 

(1) Opening and closing of stomata 

(2) Guttation 

(3) Formation of mitotic spindle 

(4) All of these 


Answer (1) 

34.  Sulphur is an important  nutrient for optimum  growth  and productivity  in 

(1) Fibre crops            (2) Cereals 

(3) Oil seed crops         (4) Pulse crops 

Answer (4) 

35.  Plants require sulphur  for

(1) DNA replication 

(2) Protein synthesis 

(3) Glucose  synthesis  

(4) ATP formation  

Answer (2) 

36. A plant requires nitrogen and sulphur for its 

(1) Cell walls          (2) Storage  vacuoles  

(3) Enzymes         (4) Energy stores 

Answer (3) 

 37.  A plant  requires phosphorus for 

(1) Cell walls      (2) Cell membranes 

(3) Enzymes        (4) Starch  deposits 

Answer (2) 

38.  A plant is showing  symptoms  like chlorosis of younger or older leaves , production of sterile  flowers and  grey spots. It may be  due to the deficiency  of 

(1) B         (2) K      (3) Mn       (4) Ca  

Answer (3) 

39.  Elements  required for ATP formation  

(1) N, Cu     (2) K, P   (3) N, P   (4) P, Ca 

Answer (3) 

40.  Which of  the  following  is a microelement?

(1) Chlorine      (2) Hydrogen  

(3) Nitrogen       (4) Oxygen  

Answer (1) 

41. Phosphorus  is always  present  in 

(1) Protein         (2) DNA and RNA 

(3) Amino acids        (4) Starch 

Answer (2)  
 
 42. Elements  useful in photosynthesis 

(1) Cu, Co, Fe        (2)  Cu, Mo,   Zn 

(3) Cl, Mg ,Mn     (4) Mg, Fe, Co, Mn 

Answer(3) 

 43.  Which of the following  plant diseases  is caused by mineral deficiency?

(1) Heart rot of beets 

(2) White Rust 

(3) Red rot of sugarcane  

(4) Wilt in cotton 

Answer (1) 

44. Root of which plant contains a red  pigment  that has affinity  for oxygen?

(1) Carrot              (2) Soyabean 

(3) Mustard           (4) Radish 

Answer (2) 

 45.  Copper is activator in enzyme 

(1) Cytochrome oxidase 

(2) Carbonic   anhydrase 

(3) Lactic  dehydrogenase  

(4) Tryptophanase 

Answer (1) 

46. A macronutrient  which is component of all organic  compounds  but is not obtained  from soil is 

(1) N         (2) P             (3) Mg     (4) C 

Answer (4) 

 47.  Which group of three micronutrient elements is required for both photosynthesis and mitochondrial  electron transport? 

(1)  Cu,  Mn, Fe     (2) Co, Ni, Mo 

(3) Ca, K, Na         (4) Mn, Co, Ca 

Answer (1) 

48.  Most abundant  element found in plants  is

(1) Carbon            (2) Nitrogen 

(3) Iron                    (4) Maganese 

Answer (1) 

49.  Farmers in a particular  region  were concerned  that pre_ mature yellowing  of leaves of a pulse crop might caused decrease in the yield. Which treatment could be most beneficial  to obtain  maximum  seed yield ?

(1) Removal of all yellow leaves and spraying the remaining  green leaves  with 2, 4, 5_ trichlorophenoxy acetic acid 


(2) Application of iron and magnesium  to promote synthesis  of chlorophyll 

(3) Frequent irrigation  of the crop 

(4) Treatment  of the plants with cytokinins alongwith a small dose of  nitrogenous  fertilizer. 


Answer (2) 

50.  Prolonged  liberal irrigation  of agricultural  fields is likely  to create the problem  of 

(1) Acidity              (2) aridity 

(3) Salinity           (4) Metal toxicity  

Answer(3) 











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