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9 Cards in this Set
- Front
- Back
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Why are "high energy" intermedicates other ATP essential for energy metabolism?
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they help maintain a relatively constant level of cellular ATP
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What happens when a phosphoryl's transfer potential is greater than that of ATP?
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they have additional stabilizing effects
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What is unique about compounds that are lower than ATP in the change of free energy of hydolysis?
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they have no significantly different resonance stabilization or charge separation compared to their hydrolysis products
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Why do phosphoguanidines like phosphocreatine and phosphoarginine have high phosphoryl transfer potentials?
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Largely as a result from the competing resonances in the guanidino group
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What do muscle and nerve cells rely on when they have a high ATP turn over?
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Phosphoguanidines to regenerate ATP rapidly
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Substrate-level phosphorylation
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when ATP is formed from ADP by direct transfer of a phosphoryl group from a high energy compound
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What do muscle and nerve cells that have a high ATP turnover rely on to regenerate ATP quickly?
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phosphoguanidines
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What synthesizes phosphocreatine in vertibrates?
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reversible phosphorylation of creatine by ATP catalyzed by creaine kinase
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What acts as an ATP "buffer" in cells that contain creatine kinase?
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phosphocreatine
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