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9 Cards in this Set

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