12-bio-botany -unit-v & VI Plants Physiology, Biology In Human Welfare

60 Questions | Total Attempts: 975

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12-bio-botany -unit-v & VI Plants 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. 
    Photosynthesis takes place in  
    • A. 

      Chloroplasts

    • B. 

      Ribosomes

    • C. 

      Mitochondria

    • D. 

      Peroxisomes

  • 2. 
    During cyclic electron transport, which one of the following isproduced  
    • A. 

      ATP only

    • B. 

      NADPH2 only

    • C. 

      NADH2 only

    • D. 

      Both ATP and NADPH2

  • 3. 
    Which one of the following is a five carbon compound?  
    • A. 

      Ribose

    • B. 

      fructose

    • C. 

      erythrose

    • D. 

      DHAP

  • 4. 
    Which one of the following is a C4 plant?  
    • A. 

      Sugarcane

    • B. 

      rice

    • C. 

      Wheat

    • D. 

      Potato

  • 5. 
    The essential component for the formation of chlorophyll  
    • A. 

      Mg

    • B. 

      Fe

    • C. 

      Cl

    • D. 

      Mn

  • 6. 
    The pigment which is highly efficient in absorbing solar energy is  
    • A. 

      Chlorophyll

    • B. 

      Phycobilins

    • C. 

      Carotinoids

    • D. 

      Xanthophyll

  • 7. 
    Which of the following bacterium oxidizes ammonia to nitrate  
    • A. 

      Nitrosomonas

    • B. 

      Rhizobium

    • C. 

      Closteridium

    • D. 

      E. coli

  • 8. 
    Which of the following is a total parasite  
    • A. 

      Cuscuta

    • B. 

      Viscum

    • C. 

      Drosera

    • D. 

      Monotropa

  • 9. 
    Which of the following wavelengths of light is most effective for photosynthesis  
    • A. 

      400 nm to 700 nm

    • B. 

      100 nm to 200 nm

    • C. 

      200 nm to 300 nm

    • D. 

      700 nm to 900 nm

  • 10. 
    Dark respiration is the function of  
    • A. 

      Mitochondria

    • B. 

      Peroxisomes

    • C. 

      Chloroplast

    • D. 

      Ribosomes

  • 11. 
    The gas evolved during photosynthesis is  
    • A. 

      Oxygen

    • B. 

      Hydrogen

    • C. 

      Carbondioxide

    • D. 

      Nitrogen

  • 12. 
    Dark reaction is also known as  
    • A. 

      Calvin cycle

    • B. 

      Krebs cycle

    • C. 

      Pentosephosphate pathway

    • D. 

      Photorespiration

  • 13. 
    C4 pathway is otherwise known as  
    • A. 

      Hatch-Slack pathway

    • B. 

      EMP pathway

    • C. 

      Photorespiration

    • D. 

      Electron transport chain

  • 14. 
    Photorespiration is otherwise called as  
    • A. 

      C2 cycle

    • B. 

      C3 cycle

    • C. 

      C4 cycle

    • D. 

      C5 cycle

  • 15. 
    An example for insectivorous plant is  
    • A. 

      Drosera

    • B. 

      Viscum

    • C. 

      Monotropa

    • D. 

      Vanda

  • 16. 
    Which of the following is regarded as primary pigment?  
    • A. 

      Chlorophyll ‘a’

    • B. 

      Carotenoid

    • C. 

      Xanthophyll

    • D. 

      Chlorophyll ‘b’

  • 17. 
    The dark reactions of photosynthesis were discovered by  
    • A. 

      Melvin Calvin

    • B. 

      Embden and Meyer

    • C. 

      Krebs

    • D. 

      Parnas

  • 18. 
    Which of the following is a 5C compound?  
    • A. 

      RuBP

    • B. 

      Glucose

    • C. 

      Fructose

    • D. 

      Phosphoglyceric acid

  • 19. 
    In C3 plants light reactions and dark reactions occur in  
    • A. 

      Mesophyll cells

    • B. 

      Bundle sheath cells

    • C. 

      Epidermal cells

    • D. 

      vascular cells

  • 20. 
    In C3 pathway acceptor molecule of CO2 is  
    • A. 

      RuBP

    • B. 

      Phosphoenol pyruvate

    • C. 

      PGA

    • D. 

      DHAP

  • 21. 
    Which of the following is not a C4 plant?  
    • A. 

      Wheat

    • B. 

      Maize

    • C. 

      Tribulus

    • D. 

      Amaranthus

  • 22. 
    Vanda plant is a/an ----  
    • A. 

      Epiphyte

    • B. 

      Total parasite

    • C. 

      partial parasite

    • D. 

      Saprophyte

  • 23. 
    The reducing power produced in the light reaction is  
    • A. 

      NADPH2

    • B. 

      ADP

    • C. 

      NADP

    • D. 

      ATP

  • 24. 
    Which of the following is not accessory pigments?  
    • A. 

      Chlorophylls

    • B. 

      Phycobilins

    • C. 

      Carotenoids

    • D. 

      Xanthophylls

  • 25. 
    The photosynthetic pigments are located in  
    • A. 

      Thylakoid

    • B. 

      Stroma

    • C. 

      Cristae

    • D. 

      Cisternae

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