Consider the reaction: malate + NAD+ → oxaloacetate + NADH + H+. Calculate ΔE°’ for the reaction.
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Consider the reaction: malate + NAD+ → oxaloacetate + NADH + H+.
Calculate ΔE°’ for the reaction.
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- When grown anaerobically on glucose, yeast (S. cerevisiae) converts pyruvate to acetaldehyde, then reduces acetaldehyde to Pethanol using electrons from NADH. Write the chemical equation for the reaction that reduces acetaldehyde (CH3CHO) to ethanol (CH3CH2OH). The table provides the standard reduction potential, E', of the relevant half-reactions. Half-reaction Acetaldehyde + 2 H+ + 2e¯ → ethanol NAD+ + 2H+ + 2e¯ → NADH + H+ E'° (V) -.197 -.320 Calculate the equilibrium constant, K'eq, at 25.0 °C for the reaction that reduces acetaldehyde to ethanol. K'e ×10 = eqWrite the coupled reaction that would occur spontaneously for the following pairs of molecules under standard condition: Oxaloaxcetate and NAD+Complete the balanced equation for the overall reaction by selecting an answer choice in the brackets. Sucrose + [2 Pi, 4Pi]+[4 ADP, 2 ADP, 4 ATP, 2ATP]+[2 NAD+, 4 NAD+, 6 NAD+]+[H2O, 5 H2O, 3 H2O] --> [2 cirate, 2 oxaloacetate, 2 pyruvate, 2 acetyl-coA]+[4 ADP, 2 ADP, 4 ATP, 2ATP] + [2 NAD+, 4 NAD+, 6 NAD+] + [2H+, 8H+, 6 H+, 4 H+, 10 H+] Does the commercial process require aerated culture medium—that is, is this a fermentation or an aerobic process? A. a fermentation process, because A. niger cells must use O2O2 to continuously regenerate NAD+ B. an aerobic process, because A. niger cells must use O2O2 to continuously regenerate NAD+ C. a fermentation process, because A. niger cells cannot use O2O2 to continuously regenerate NAD+ D. an aerobic process, because A. niger cells cannot use O2O2 to continuously regenerate NAD+
- Complete the balanced equation for the overall reaction. Select answer choice in between brackets. Sucrose + [2 Pi, 4Pi]+[4 ADP, 2 ADP, 4 ATP, 2ATP]+[2 NAD+, 4 NAD+, 6 NAD+]+[H2O, 5 H2O, 3 H2O] --> [2 cirate, 2 oxaloacetate, 2 pyruvate, 2 acetyl-coA]+[4 ADP, 2 ADP, 4 ATP, 2ATP] + [2 NAD+, 4 NAD+, 6 NAD+] + [2H+, 8H+, 6 H+, 4 H+, 10 H+] Does the commercial process require aerated culture medium—that is, is this a fermentation or an aerobic process? A. a fermentation process, because A. niger cells must use O2O2 to continuously regenerate NAD+ B. an aerobic process, because A. niger cells must use O2O2 to continuously regenerate NAD+ C. a fermentation process, because A. niger cells cannot use O2O2 to continuously regenerate NAD+ D. an aerobic process, because A. niger cells cannot use O2O2 to continuously regenerate NAD+Under standard conditions, will the following reaction proceed spontaneously as written? Fumarate + NADH + H+⇌ succinate + NAD+explain in quantitative terms the circumstances under which the following reaction can porceed; L-malate + NAD+ (forward arrow) oxaloacetate + NADH + H+ delta G' standard = +29.7 KJ/mol
- Balance the following net reaction that occurs during oxidative phosphorylation. Use the smallest whole integers possible for the reaction stoichiometry. NADH+ FADH₂ + ADP+ 0₂+H+PO, ¹ NAD+FAD+ ATP+ +H₂OFor the following reaction[FAD] + 2 cyt c (Fe 2+) + 2 H+ —> [FADH2] + 2 cyt c (Fe+3)determine which of the redox couples is the electron acceptor and which is the electron donor under standard-state conditions, calculatethe value of ΔE and determine the free energy change for the reaction.Consider the malate dehydrogenase reaction from the citric acid cycle. Given the listed concentrations, calculate the free energy change for this reaction at energy change for this reaction at 37.0 °C (310 K). AG' for the reaction is +29.7 kJ/mol. Assume that the reaction occurs at pH 7. [malate] = 1.43 mM [oxaloacetate] = 0.220 mM [NAD*] = 460 mM [NADH] = 180 mM AG : kJ-mol-1
- Write out the full redox reaction that happens when both of these reactions are added to the same reaction where there is 1M concentrations of each reactant and products, pH7, and temeprature is 290K. Identify which compounds will be reduced and which compounds will be oxidized. redox reaction 1: Pyruvate¯ + 2H+ + 2e¯ → lactate¯ E'o(V) = -0.185 redox reaction 2: NAD+ + H+ + 2e¯ → NADH E'o(V) = -0.320Indicate whether each of the following changes represents oxidation or reduction. Write: O = for oxidation ; R= for reduction Example: cyt ci (Fet) → cyt c1 (Fe2+) Answer: R Blank #1: COQH2 → CoQ Blank #2: NAD+ - NADH Blank #3: FMN → FMNH2 Blank # 4: FADH2 FAD Blank #5: Fe(III) SP → Fe(II) SP Blank # 1 Blank # 2Example: Oxidation of ethanol by NAD+ in the presence catalyzed by alcohol dehydrogenase Calculate the standard free energy change for the reaction below: Ethanol + NAD* 2 acetaldehydye + NADH + H*