12-botany-unit-v & Vi Plant Physiology & Biology In Human Welfare

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12-botany-unit-v & Vi  Plant Physiology  & Biology In Human Welfare

Prepared by Mr. D. Rajamani, M. Sc. ,M. Ed. , P. G. Asst Botany A. C. S Mat. Hr Sec. School, Arni. Tiruvannamalai Dist   ; &nbs p; & www. Padasalai. Net


Questions and Answers
  • 1. 
    The term enzyme was coined by
    • A. 

      Kuhne

    • B. 

      Fischer

    • C. 

      Buchner

    • D. 

      Koshland

  • 2. 
    The lock and key theory of enzyme action was proposed by 
    • A. 

      Fischer

    • B. 

      Kuhne

    • C. 

      Buchner

    • D. 

      Koshland

  • 3. 
    An example for transverase is
    • A. 

      Transaminase

    • B. 

      Pyruvic carboxylase

    • C. 

      Histidine decarboxylase

    • D. 

      G-3-P dehydrogenase

  • 4. 
    Photosynthesis takes place in  
    • A. 

      chloroplasts

    • B. 

      Mitochondria

    • C. 

      Peroxisomes

    • D. 

      ribosomes

  • 5. 
    During cyclic electron transport, which one of the following is produced  
    • A. 

      ATP only

    • B. 

      NADPH2 only

    • C. 

      NADH2 only

    • D. 

      both ATP and NADPH2

  • 6. 
    Which one of the following is a five carbon compound?  
    • A. 

      Ribose

    • B. 

      DHAP

    • C. 

      fructose

    • D. 

      erythrose

  • 7. 
    The essential component for the formation of chlorophyll  
    • A. 

      Mg

    • B. 

      Fe

    • C. 

      Cl

    • D. 

      Mn

  • 8. 
    Which one of the following is a C4 plant?  
    • A. 

      Sugarcane

    • B. 

      Potato

    • C. 

      Rice

    • D. 

      Wheat

  • 9. 
    Which of the following bacterium oxidizes ammonia to nitrate  
    • A. 

      Nitrosomonas

    • B. 

      Rhizobium

    • C. 

      Closteridium

    • D. 

      E. coli

  • 10. 
    The pigment which is highly efficient in absorbing solar energy is  
    • A. 

      Chlorophyll

    • B. 

      Phycobilins

    • C. 

      Carotinoids

    • D. 

      Xanthophyll

  • 11. 
    Which of the following is a total parasite  
    • A. 

      Cuscuta

    • B. 

      Viscum

    • C. 

      Drosera

    • D. 

      Monotropa

  • 12. 
    Which of the following wavelengths of light is most effective for photosynthesis  
    • A. 

      400 nm to 700 nm

    • B. 

      700 nm to 900 nm

    • C. 

      100 nm to 200 nm

    • D. 

      200 nm to 300 nm

  • 13. 
    Dark respiration is the function of  
    • A. 

      Mitochondria

    • B. 

      Peroxisomes

    • C. 

      Chloroplast

    • D. 

      Ribosome

  • 14. 
    Dark reaction is also known as  
    • A. 

      Calvin cycle

    • B. 

      Krebs cycle

    • C. 

      Pentosephosphate pathway

    • D. 

      photorespiration

  • 15. 
    The gas evolved during photosynthesis is  
    • A. 

      Oxygen

    • B. 

      hydrogen

    • C. 

      carbondioxide

    • D. 

      Nitrogen

  • 16. 
    C4 pathway is otherwise known as  
    • A. 

      Hatch-Slack pathway

    • B. 

      EMP pathway

    • C. 

      photorespiration

    • D. 

      Electron transport chain

  • 17. 
    An example for insectivorous plant is  
    • A. 

      Drosera

    • B. 

      Viscum

    • C. 

      Monotropa

    • D. 

      Vanda

  • 18. 
    Photorespiration is otherwise called as  
    • A. 

      C2 cycle

    • B. 

      C3 cycle

    • C. 

      C4 cycle

    • D. 

      C5 cycle

  • 19. 
    Which of the following is regarded as primary pigment?  
    • A. 

      Chlorophyll ‘a’

    • B. 

      Chlorophyll ‘b’

    • C. 

      Carotenoid

    • D. 

      Xanthophyll

  • 20. 
    The dark reactions of photosynthesis were discovered by  
    • A. 

      Melvin Calvin

    • B. 

      Krebs

    • C. 

      Embden and Meyer

    • D. 

      Parnas

  • 21. 
    Which of the following is a 5C compound?  
    • A. 

      RuBP

    • B. 

      Glucose

    • C. 

      Fructose

    • D. 

      Phosphoglyceric acid

  • 22. 
    In C3 plants light reactions and dark reactions occur in  
    • A. 

      Mesophyll cells

    • B. 

      bundle sheath cells

    • C. 

      Epidermal cells

    • D. 

      Vascular cells

  • 23. 
    In C3 pathway acceptor molecule of CO2 is  
    • A. 

      RuBP

    • B. 

      Phosphoenol pyruvate

    • C. 

      PGA

    • D. 

      DHAP

  • 24. 
    Which of the following is not a C4 plant?  
    • A. 

      Wheat

    • B. 

      Amaranthus

    • C. 

      Maize

    • D. 

      Tribulus

  • 25. 
    Vanda plant is a/an ----  
    • A. 

      Epiphyte

    • B. 

      total parasite

    • C. 

      Partial parasite

    • D. 

      Saprophyte

  • 26. 
    The reducing power produced in the light reaction is  
    • A. 

      NADPH2

    • B. 

      ADP

    • C. 

      NADP

    • D. 

      ATP

  • 27. 
    Which one of the following plant hormones was first discovered?  
    • A. 

      Auxin

    • B. 

      Cytokinin

    • C. 

      Gibberellin

    • D. 

      thylene

  • 28. 
    The photosynthetic pigments are located in  
    • A. 

      Thylakoid

    • B. 

      Cristae

    • C. 

      Cisternae

    • D. 

      Stroma

  • 29. 
    The number of high energy terminal bonds present in ATP is  
    • A. 

      Two

    • B. 

      One

    • C. 

      Three

    • D. 

      Four

  • 30. 
    Which of the following is the common respiratory substrate?  
    • A. 

      Carbohydrates

    • B. 

      Vitamins

    • C. 

      Proteins

    • D. 

      Lipids

  • 31. 
    Cisaconitic acid is converted into isocitric acid by the addition of a molecule of water. This reaction is catalyzed by  
    • A. 

      Aconitase

    • B. 

      Citric acid synthetase

    • C. 

      Fumarase

    • D. 

      Malic dehydrogenase

  • 32. 
    The first step in aerobic respiration is  
    • A. 

      Glycolysis

    • B. 

      Krebs cycle

    • C. 

      terminal oxidation

    • D. 

      Cyclic photophosphorylation

  • 33. 
    Fructose 1,6-bisphosphate is cleaved to two molecules of 3 carbon compounds by  
    • A. 

      hexokinase

    • B. 

      Aldolase

    • C. 

      Enolase

    • D. 

      Pyruvic kinase

  • 34. 
    Glucose is phosphorylated to glucose-6-phosphate by the enzyme  
    • A. 

      Aldolase

    • B. 

      Enolase

    • C. 

      pyruvic kinase

    • D. 

      Hexokinase

  • 35. 
    Complete oxidation of one molecule of glucose yields  
    • A. 

      38 ATP

    • B. 

      36 ATP

    • C. 

      35 ATP

    • D. 

      2 ATP

  • 36. 
    Oxidative decarboxylation of pyruvic acid is catalysed by  
    • A. 

      pyruvic dehydrogenase

    • B. 

      Pyruvic kinase

    • C. 

      pyruvic mutase

    • D. 

      Pyruvic isomerase

  • 37. 
    A - ketoglutaric acid is a _____ carbon compound  
    • A. 

      five

    • B. 

      Four

    • C. 

      two

    • D. 

      Three

  • 38. 
    Glucose is phosphorylated to glucose-6-phosphate by  
    • A. 

      Hexokinase

    • B. 

      Mutase

    • C. 

      Aldolase

    • D. 

      kinase

  • 39. 
    Respiratory quotient of glucose is  
    • A. 

      Unity

    • B. 

      zero

    • C. 

      More than one

    • D. 

      less than one

  • 40. 
    One molecule of FADH2 on oxidation yields  
    • A. 

      Two ATP

    • B. 

      One ATP

    • C. 

      Three ATP

    • D. 

      four ATP

  • 41. 
    One molecule of NADH2 on oxidation yields  
    • A. 

      Three ATP

    • B. 

      One ATP

    • C. 

      Two ATP

    • D. 

      Four ATP

  • 42. 
    Formation of ATP during electron transport chain is known as  
    • A. 

      Oxidative phosphorylation

    • B. 

      dephosphorylation

    • C. 

      Phtophosphorylation

    • D. 

      Substate level phosphorylation

  • 43. 
    Which of the following is referred to as EMP pathway?  
    • A. 

      Glycolysis

    • B. 

      Krebs cycle

    • C. 

      Electron transport chain

    • D. 

      Pentose phosphate pathway

  • 44. 
    The total amount of energy released from one molecule of glucose on oxidation is about  
    • A. 

      2900 kJ

    • B. 

      2500 kJ

    • C. 

      1600 kJ

    • D. 

      2300 kJ

  • 45. 
    Which of the following is a 5C compound?  
    • A. 

      Xylulose phosphate

    • B. 

      Sedoheptulose phosphate

    • C. 

      Phosphoglyceraldehyde

    • D. 

      Erythrosephosphate

  • 46. 
    An example for synthetic auxin is  
    • A. 

      NAA

    • B. 

      IAA

    • C. 

      PAA

    • D. 

      ABA

  • 47. 
    Apical dominance is due to  
    • A. 

      Auxin

    • B. 

      Cytokinin

    • C. 

      Gibberellin

    • D. 

      Ethylene

  • 48. 
    Bakanae disease in paddy is caused by  
    • A. 

      Gibberellic acid

    • B. 

      Naphthelene acetic acid

    • C. 

      Abscissic acid

    • D. 

      Phenyl acetic acid

  • 49. 
    Auxin prevents  
    • A. 

      abscission

    • B. 

      Apical dominance

    • C. 

      Ageing process

    • D. 

      parthinocarpy

  • 50. 
    In sigmoid curve the rapid growth phase is designated as  
    • A. 

      Log phase

    • B. 

      lag phase

    • C. 

      Dormant phase

    • D. 

      Steady state phate

  • 51. 
    “Foolish seedling” disease of rice is caused by  
    • A. 

      Gibbrellins

    • B. 

      Auxin

    • C. 

      Abscisic acid

    • D. 

      cytokinin

  • 52. 
    Closure of stomata is caused by  
    • A. 

      abscisic acid

    • B. 

      Auxin

    • C. 

      Gibbrellins

    • D. 

      Cytokinin

  • 53. 
    The chemical used in the field to eradicate weeds is  
    • A. 

      2, 4 - D

    • B. 

      IAA

    • C. 

      ABA

    • D. 

      Urea

  • 54. 
    Abscission is prevented by  
    • A. 

      Auxin

    • B. 

      Gibberellin

    • C. 

      Cytokinin

    • D. 

      Ethylene

  • 55. 
    Which of the following is a gaseous hormone?
    • A. 

      Ethylene

    • B. 

      Kinetin

    • C. 

      Zeatin

    • D. 

      Auxin

  • 56. 
    Which of the following is natural auxin found in higher plants?
    • A. 

      IAA

    • B. 

      GA

    • C. 

      2,4,D

    • D. 

      Zeatin

  • 57. 
    Photoperiodic response in flowering was first observed in  
    • A. 

      Maryland Mammoth

    • B. 

      Wheat

    • C. 

      Oats

    • D. 

      Chrysanthemum

  • 58. 
    The response of a plant to the relative lengths of light and dark periods is known as  
    • A. 

      Photorespiration

    • B. 

      vernalization

    • C. 

      Photosynthesis

    • D. 

      Photoperiodism

  • 59. 
    Which of the following is a short day plant?  
    • A. 

      Tobacco

    • B. 

      Wheat

    • C. 

      Sunflower

    • D. 

      Maize

  • 60. 
    Which pathogen causes the blast disease of rice?  
    • A. 

      Pyricularia oryzae

    • B. 

      Cercospora personata

    • C. 

      Xanthomonas citri

    • D. 

      Tungro virus

  • 61. 
    Which of the following is a long day plant?  
    • A. 

      wheat

    • B. 

      Maize

    • C. 

      Tobacco

    • D. 

      Sunflower

  • 62. 
    Which pathogen causes Tikka disease of groundnut?  
    • A. 

      Cercospora personata

    • B. 

      Pyricularia oryzae

    • C. 

      Xanthomonas citri

    • D. 

      Tungro virus

  • 63. 
    Acalyphine is extracted from  
    • A. 

      Acalypha indica

    • B. 

      Aegle marmelos

    • C. 

      Cissus quadrangularis

    • D. 

      Mimosa pudica

  • 64. 
    Binomial of ‘vilvum’ is  
    • A. 

      Aegle marmelos

    • B. 

      Acalypha indica

    • C. 

      Cissus quadrangularis

    • D. 

      Mimosa pudica