Write a balanced equation for the complete metabolic oxidation of each of the following. Include Oz, ADP, and P; as reactants and ATP, CO, and H20 as products. (a) Stearic acid. (c) Palmitic acid (b) Oleic acid (d) Linoleic acid
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- Examine the ActiveModel for alcohol dehydrogenase and describe the structure and function of the catalytic zinc center.Write a balanced equation for the complete metabolic oxidation of each of the following. Include O2, ADP, and Pi as reactants and ATP, CO2, and H2O as products. (a) Stearic acid (b) Oleic acid (c) Palmitic acid (d) Linoleic acidGiven the following information, calculate the physiological ΔG of the isocitrate dehydrogenase reaction at 25°C and pH 7.0: [NAD+]/[NADH] = 8, [α-ketoglutarate] = 0.1 mM, and [isocitrate] = 0.02 mM. Assume standard conditions for CO2 (ΔG°′ is given in Table). Is this reaction a likely site for metabolic control?
- If palmitic acid is subjected to complete combustion in a bomb calorimeter, one can calculate a standard free energy of combustion of 9788 kJ/mol. From the ATP yield of palmitate oxidation, what is the metabolic efficiency of the biological oxidation, in terms of kilojoules saved as ATP per kilojoule released? (Ignore the cost of fatty acid activation.)Using the symbols X-H2 and Y, draw a coupled oxidation-reduction reaction. Designate the molecule that is reduced and the one that is oxidized and state which one is the reducing agent and which is the oxidizing agent.Why does biological Fe2+ oxidation under oxic conditions occurmainly at acidic pH?
- The first three steps of β oxidation (Fig.) chemically resemble three successive steps of the citric acid cycle. Which steps are these?Does the complete oxidation of tridecanoic acid (C13:0) make more ATP than the complete oxidation of 9-tetradecenoic acid (C14:1, Δ9) inside human body? Show your calculation.The complete combustion of palmitate and glucose yields 9781 kJ ∙ mol−1 and 2850 kJ ∙ mol−1 of free energy, respectively. Compare these values to the free energy (as ATP) obtained though catabolism of palmitate and glucose under standard conditions. Which process is more efficient?
- Under standard conditions, is the oxidation of ubiquinol (Coenzyme Q) by O2 sufficiently exergonic to drive the synthesis of ATP? If yes, how many ATP can be synthesized assuming 100% efficiency?What are the products of β-oxidation?How many ATP’s are formed in the process phosphoglyceraldehyde also known as PGAL?