Quiz  /  NEET MCQ on Electron Transport System

  • 1. 
    Which of the following is the correct sequence of electron acceptors in ETS for production of ATP?

  • Cyt b, c, a, a3
  • Cyt a, a, b, c
  • Cyt c, b, a, a3
  • Cyt b, c, a

  • 2. 
    Which of the following terminal cytochromes is responsible for donating electrons to oxygen?

  • Cyt a
  • Cyt b
  • Cyt c
  • Cyt a

  • 3. 
    Electron transport system (ETS) is present in which of the following parts of mitochondria?

  • Inner membrane
  • Outer membrane
  • Matrix
  • Stroma

  • 4. 
    Which of the following is the first complex (Complex I) of ETS?

  • NADH dehydrogenase
  • Cytochrome aa
  • Cytochrome bc
  • ATP synthase

  • 5. 
    Which of the following is the Complex III of ETS?

  • NADH dehydrogenase
  • Cytochrome aa
  • Cytochrome bc
  • ATP synthase

  • 6. 
    Ubiquinone transfers its electrons to

  • Complex I
  • Complex II
  • matrix
  • Cyt c

  • 7. 
    In which part of the cell, oxidative phosphorylation takes place?

  • Inner mitochondrial membrane
  • Outer mitochondrial membrane
  • Grana of chloroplast
  • Stroma of chloroplast

  • 8. 
    Cytochromes are present in

  • lysosomes
  • mitochondrial matrix
  • cristae of mitochondria
  • outer membrane of mitochondria

  • 9. 
    ATP synthesis by ATP synthase is driven by the movement of

  • protons
  • NADPH
  • electrons
  • All of the above

  • 10. 
    Oxidative phosphorylation results in the formation of

  • Oxygen
  • ADP
  • ATP + H
  • NADH

  • 11. 
    Which of the following complexes of ETS does not account for the pumping out of protons from the mitochondrial matrix?

  • Complex I
  • Complex III
  • Complex II
  • Complex IV

  • 12. 
    Which of the following is the Complex IV of ETS?

  • NADH dehydrogenase
  • Cytochrome c oxidase
  • Cytochrome bc
  • Succinate dehydrogenase

  • 13. 
    Which of the following is the Complex II of ETS?

  • NADH dehydrogenase
  • Succinate dehydrogenase
  • Cytochrome bc
  • ATP synthase

  • 14. 
    Which of the following products of glucose oxidation are necessary for oxidative phosphorylation?

  • Pyruvate
  • NADH and FADH
  • Acetyl CoA
  • NADPH and ATP

  • 15. 
    Which of the following is true for cytochrome c oxidase complex?

  • It donates electrons to O
  • It accepts electrons from Cyt c
  • It pumps two protons out of the mitochondrial matrix
  • All of the above
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