Mitochondria MCQ Questions and Answers Quiz

11. To reduce one molecule of O2, ..............electron(s) must be passed through the electron transport chain and ..............molecule(s) of NADH is(are) oxidized.

  1. 1, 1
  2. 4, 4
  3. 1, 2
  4. 4, 2

12. Which is a component of complex I?

  1. FMN
  2. FAD
  3. TPP
  4. Q

13. How many protons are translocated across the membrane by complex I for every pair of electrons that are passed from NADH to QH2?

  1. 1
  2. 2
  3. 3
  4. 4

14. Which complex in the electron transport chain does not contribute to the proton gradient?

  1. I
  2. II
  3. III
  4. IV

15. The terminal electron acceptor for complex III of the electron transport chain is

  1. Fe-S
  2. Q
  3. FAD
  4. cytochrome C

16. Superoxide dismutase protects cells from damage caused by

  1. H3O+
  2. O2-
  3. H2O2
  4. O32-
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