During transfer of two electrons through the mitochondrial respiratory chain, the overall reaction is: NADH + 1/2 O$_2$ + H$^+$ $ ightarrow$ NAD$^+$ + H$_2$O For this reaction, the difference in reduction potentials for the two half-reactions, $Delta E^circ$', is +1.14 V. Calculate the standard free-energy change, $Delta G^circ$', for the reaction. The Faraday constant, F, is 96.48 kJ/V.mol.
Added by Joseph F.
Close
Step 1
The free-energy change for the transfer of two Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 85 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The transfer of electrons in the respiratory chain in the mitochondria can be represented by the reaction: NADH + H(+) + O2 -> H2O + NAD(+) A) Calculate delta E for the reaction if: 1) NAD(+) + H(+) + 2e- -> NADH delta E = -0.320 V 2) O2 + 2H(+) + 2e- -> H2O delta E = 0.816 V B) Calculate delta G under standard conditions. Constants you may need: F = 96.5 kJ/V mol R = 8.315 J/mol * K
Sri K.
Electron transfer in the mitochondrial respiratory chain may be represented by the net reaction equation $$\mathrm{NADH}+\mathrm{H}^{+}+\frac{1}{2} \mathrm{O}_{2} \rightleftharpoons \mathrm{H}_{2} \mathrm{O}+\mathrm{NAD}^{+}$$ (a) Calculate $\Delta E^{\prime \circ}$ for the net reaction of mitochondrial electron transfer. Use $E^{\prime \circ}$ values in Table 13-7. (b) Calculate $\Delta G^{\prime \circ}$ for this reaction. (c) How many ATP molecules can theoretically be generated by this reaction if the free energy of ATP synthesis under cellular conditions is $52 \mathrm{kJ} / \mathrm{mol} ?$
From the biological standard half-cell potentials E⊕(O2,H+,H2O) = +0.82 V and E⊕(NAD+,H+,NADH) = -0.32 V, calculate the standard potential arising from the reaction in which NADH is oxidized to NAD+ and the corresponding biological standard reaction Gibbs energy.
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD