Question

16. This problem aims to familiarize you with the use of ?G° values in biological reactions as well as deeper thought: You are studying a biochemical pathway that requires ATP as an energy source. To your dismay, the reactions soon stop, partly because the ATP is rapidly used up and partly because an excess of ADP builds up and inhibits the enzymes involved. You are about to give up when the following table from a biochemistry journal catches your eye. hydrolysis reaction ?G° creatine + ATP --enzyme A--> creatine phosphate + ADP +3 kcal/mole ATP + H2O --enzyme B--> ADP + phosphate -7.3 kcal/mole pyrophosphate + H2O --enzyme C--> 2 phosphate -7 kcal/mole glucose 6-phosphate + H2O --enzyme D--> glucose + phosphate -3.3 kcal/mole Which of the following reagents are most likely to revitalize your reaction? a) a vast excess of ATP b) glucose 6-phosphate and enzyme D c) creatine phosphate and enzyme A d) pyrophosphate

          16. This problem aims to familiarize you with the use of ?G° values in biological reactions as well as deeper thought: You are studying a biochemical pathway that requires ATP as an energy source. To your dismay, the reactions soon stop, partly because the ATP is rapidly used up and partly because an excess of ADP builds up and inhibits the enzymes involved. You are about to give up when the following table from a biochemistry journal catches your eye.

hydrolysis reaction ?G°
creatine + ATP --enzyme A--> creatine phosphate + ADP +3 kcal/mole
ATP + H2O --enzyme B--> ADP + phosphate -7.3 kcal/mole
pyrophosphate + H2O --enzyme C--> 2 phosphate -7 kcal/mole
glucose 6-phosphate + H2O --enzyme D--> glucose + phosphate -3.3 kcal/mole

Which of the following reagents are most likely to revitalize your reaction?
a) a vast excess of ATP
b) glucose 6-phosphate and enzyme D
c) creatine phosphate and enzyme A
d) pyrophosphate

16. This problem aims to familiarize you with the use of ?G° values in biological reactions as well as deeper thought: You are studying a biochemical pathway that requires ATP as an energy source. To your dismay, the reactions soon stop, partly because the ATP is rapidly used up and partly because an excess of ADP builds up and inhibits the enzymes involved. You are about to give up when the following table from a biochemistry journal catches your eye.

hydrolysis reaction ?G°
creatine + ATP –enzyme A–> creatine phosphate + ADP +3 kcal/mole
ATP + H2O –enzyme B–> ADP + phosphate -7.3 kcal/mole
pyrophosphate + H2O –enzyme C–> 2 phosphate -7 kcal/mole
glucose 6-phosphate + H2O –enzyme D–> glucose + phosphate -3.3 kcal/mole

Which of the following reagents are most likely to revitalize your reaction?
a) a vast excess of ATP
b) glucose 6-phosphate and enzyme D
c) creatine phosphate and enzyme A
d) pyrophosphate

Added by Agust-N H.

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