NEET MCQ on Electron Transport System Quiz Questions

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

A Cyt b, c, a, a3 B Cyt a, a, b, c C Cyt c, b, a, a3 D Cyt b, c, a

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

A Cyt a B Cyt b C Cyt c D Cyt a

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

A Inner membrane B Outer membrane C Matrix D Stroma

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

A NADH dehydrogenase B Cytochrome aa C Cytochrome bc D ATP synthase

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

A NADH dehydrogenase B Cytochrome aa C Cytochrome bc D ATP synthase

6. Ubiquinone transfers its electrons to

A Complex I B Complex II C matrix D Cyt c

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

A Inner mitochondrial membrane B Outer mitochondrial membrane C Grana of chloroplast D Stroma of chloroplast

8. Cytochromes are present in

A lysosomes B mitochondrial matrix C cristae of mitochondria D outer membrane of mitochondria

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

A protons B NADPH C electrons D All of the above

10. Oxidative phosphorylation results in the formation of

A Oxygen B ADP C ATP + H D NADH

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

A Complex I B Complex III C Complex II D Complex IV

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

A NADH dehydrogenase B Cytochrome c oxidase C Cytochrome bc D Succinate dehydrogenase

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

A NADH dehydrogenase B Succinate dehydrogenase C Cytochrome bc D ATP synthase

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

A Pyruvate B NADH and FADH C Acetyl CoA D NADPH and ATP

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

A It donates electrons to O B It accepts electrons from Cyt c C It pumps two protons out of the mitochondrial matrix D All of the above