Module 3 Topic 1: Redox

9 flashcards · Other · by Haroon Chehabzada

1. What are the energy requirements for an average adult?

   The energy requirements for an average adult are discussed.

2. How is ATP produced in mitochondria?

   ATP is produced in mitochondria through oxidative phosphorylation.

3. What are REDOX reactions?

   REDOX reactions are reduction-oxidation reactions that occur when a compound loses or gains electrons.

4. How is ATP generated through REDOX reactions in mitochondria?

   ATP is generated through REDOX reactions in mitochondria via glycolysis, the Krebs cycle, and the electron transport chain.

5. What are coupled reactions?

   REDOX pairs need to be coupled for reactions to occur, and electrons can be transferred directly or as hydrogen atoms.

6. How are electrons transferred in NAD+ linked dehydrogenation reactions?

   Electrons can be transferred as a hydride ion H- (a proton with 2 electrons), and this occurs with NAD+ linked dehydrogenation reactions: AH2 + NAD+ A + NADH + H+.

7. What is the standard reduction potential?

   The standard reduction potential is the tendency of a conjugate redox pair to transfer electrons spontaneously and is measured in volts at standard conditions.

8. How do electrons flow in standard reduction potentials?

   Electrons flow from more negative to more positive E'o pairs, where the more negative the E'o value, the greater the tendency to lose electrons to pairs higher on the table.

9. What is the equation to calculate the standard free energy change (Gibbs Free Energy) of a reaction?

   The equation to calculate the standard free energy change (Gibbs Free Energy) of a reaction is AGo = -nFA, where AG° = standard free energy change (kJ.mol-1) (kJ/mol), n = number of electrons transferred, F = Faradays constant (96.5 kJ.mol-1.V-1), and AE = difference in standard reduction potentials between the 2 redox pairs (electromotive force, cell voltage, or cell potential).