Self Quiz for Oxidative Phosphorylation

Study the material in this section and then write out the answers to these question.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Briefly describe the process of oxidative phosphorylation. (ans)

2. Another name for a hydrogen ion (H⁺) is: (ans)

3. An atom or molecule gains an electron. This best describes:

a. oxidation (ans)
b. reduction (ans)
c. dehydrogenation (ans)
d. hydrogenation (ans)

4. When a molecule gains electrons or both protons and electrons, we say it becomes:

a. oxidized (ans)
b. reduced (ans)

5. Cells use specific molecules to carry the electrons that are removed during the oxidation of an energy source. These molecules are called electron carriers and they alternately become oxidized and reduced during electron and proton transfer. Name three freely diffusible coenzymes and give both their oxidized and reduced state. (ans)

6. A coenzyme that often works in conjunction with an enzyme called a dehydrogenase. The enzyme removes two hydrogen atoms (2H⁺ and 2e^-) from its substrate. Both electrons but only one proton are accepted to produce its reduced form that is used to generate proton motive force for driving the synthesis of ATP. This best describes:

a. NAD⁺ (ans)
b. FAD (ans)
c. NADP⁺ (ans)

7. NADH + H⁺ is the ________________ form of NAD⁺. (ans)

8. Describe an electron transport chain. (ans)

9. Based on the chemiosmotic theory, briefly describe proton motive force and how it develops within a cell. (ans)

10. Based on the chemiosmotic theory, briefly describe how proton motive force leads to the generation of ATP. (ans)

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