glycolysis questions

[roxy]

1) hexose isomerase reaction is endergonic reaction

G6P <-----> F6P

 

deltaG= +1.7kJ/mole

how does this reaction proceed in the forward dirction during glycolysis

 

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im not sure but is it because the proceeding reactions are exergonic which would push this reaction forward

 

2) the body stores glycogen (a polymer of glucose)as emergency store for energy generation. Explain why we dont store a) glucose b) ATP c) fat as such emergency stock

 

 

 

 

last thing can someone please explain the futile cycle for phosphofructokinase frutose 1,6 biphosphate

 

 

thank you soo much in advance