Le Chatelier's Principle on Equilibrium Shift

Steps:

• Identify the reaction involving pyrophosphate, typically a product in biochemical processes like polymerization.
• Apply Le Chatelier's principle: increasing product concentration shifts equilibrium toward reactants.
• Determine graph type: likely concentration vs. time, showing decreased forward reaction rate or product buildup reversal.
• Match to option showing equilibrium shift left, reducing net product formation.

Why C is correct:

• Graph C depicts decreased forward rate and increased reverse rate per Le Chatelier's principle, as [PPi] rise opposes product accumulation.

Why the others are wrong:

• A shows no change, ignoring concentration effect on equilibrium.
• B indicates increased forward rate, contradicting product inhibition.
• D displays complete reaction halt, overstating inhibition without reversal.

Not enough information on exact graph details, but C fits standard depiction.

Final answer: C