Question

10. For a given reduced/oxidized molecular pair (X /X), a negative reducing potential suggests that the x has a higher affinity for the electrons than x does X has a higher affinity for electrons than H2 does. X has a lower affinity for the electrons than x does X has a lower affinity for electrons than H2 does.

For biochemistry- Oxidative Phosphorylation

please answer all 3 i really need help with these. thank you!!

Answer 1

10. The correct answer for this is - a

A solution which has a lower negative potential always has a tendency to lose electrons to the new species i.e the new species has a greater affinity for electrons than the species from which it was obtained by reduction or oxidation. Hence X^- has a higher affinity for electrons than X.

12. The correct answer for this is - Dinitrophenol

Dinitrophenol is an ionophoric compound which bypasses ATP synthesis, while electron transport chain continues. In this process, the energy of the proton gradient is lost as heat. This cessation of ATP production causes an increase in metabolic rate.

14. The correct answer for this is - DNP is capable of transporting protons across the membrane, dissipating the proton gradient.

This mechanism of action equalises the concentration of hydrogen ions on either side of the membrane which prevents the formation of a proton gradient , thus collapsing the proton motive force which is used by the ATP synthase complex to generate ATP.