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Considere las energas libres estndar que se muestran a continuacin (T = 37 C, R = 8,3145 J/mol K): UDP-Manosa + H2O Manosa 1-fosfato +

Considere las energas libres estndar que se muestran a continuacin (T = 37 C, R = 8,3145 J/mol K):

UDP-Manosa + H2O Manosa 1-fosfato + UMP + 2H+ delta G' = -34,9 kJ/mol

UTP + H2O UMP + PPi + 2H+ delta G' = -32,5 kJ/mol

PPi + H2O 2Pi delta G' = -33,6 kJ/mol

(A) (2 pts) Calcular delta G' y Keq' para la siguiente reaccin.

Manosa 1-fosfato + UTP + H2O UDP-manosa + 2Pi

(B) (2 pts) Cul de las siguientes afirmaciones describe mejor esta reaccin?

(A) La reaccin es irreversible en condiciones estndar.

(B) La reaccin es reversible en condiciones estndar.

(C) La reaccin est en equilibrio en condiciones intracelulares.

(D) La reaccin es reversible en condiciones intracelulares.

(E) K'eq = 0

(C) (2 pts) Esta reaccin es catalizada por fosfomanosa pirofosforilasa. Cmo afectara esta enzima a delta G' y Keq'?

(D) (3 pts) La concentracin fisiolgica de estos tres metabolitos en una clula de mamfero a temperatura fisiolgica (37 C) son: [UDP-manosa] = 0,130 mM; [UMP] = 0,140 mM, [H2O] = 55,6 M, [H+] = 10 -7 M y [manosa 1-fosfato] = 2,33 mM [UTP] = 4,35 mM; [Pi] = 8,90 mM [PPi] = 8,14 microM

Cul sera el cambio de energa libre real (delta G) para la reaccin bajo estas condiciones celulares?

Manosa 1-fosfato + UTP + H2O UDP-manosa + 2Pi

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