Why are ∆G°' values not rigorously applicable to biochemical systems?
Answer to relevant QuestionsIdentify the molecules oxidized and reduced in the following reactions and write the half reactions. (a) CH3CH2CHO + NADH → CH3CH2CH2OH + NAD+ (b) Cu2+ (aq) + Fe2+ (aq) → Cu+ (aq) + Fe3+ (aq) The standard free-energy change for the reaction Arginine + ATP → Phosphoarginine + ADP is 11.7 kJ mol21. From this information and that in Table 15.1, calculate the ∆G°' for the reaction Phosphoarginine + H2O → ...Consider the structures of arabinose and ri-bose. Explain why nucleotide derivatives of arabinose, such as ara-C and ara-A, are effective metabolic poisons. Suppose that a polymer of glucose with alternating a(1 → 4) and β(1 → 4) glycosidic linkages has just been discovered. Draw a Haworth projection for a repeating tetramer (two repeating dimers) of such a polysaccharide. ...Which reaction or reactions that we have met in this chapter require NADH? Which reaction or reactions require NAD+? List the enzymes that catalyze the reactions that require NADH and that require NAD+.
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