1. Calculate the massaction ratio, , from the approximate physiological concentrations for rat heart tissue shown in the table.

2. Select all that apply to the true statements about the PFK1 reaction.

A) In heart tissue, the PFK1 products are more abundant than reactants.

B)In heart tissue, the PFK1 reaction will be driven toward product formation.

C) The PFK1 reaction in heart tissue does not reach equilibrium.

D) Under standard conditions, the PFK1 reaction reaches equilibrium when the concentrations of all products and reactants are equal.

Concentration (UM) 75.0 Metabolite fructose 6-phosphate fructose 1,6-bisphosphate ATP 20.0 12,100 1,150 ADP