It might seem odd that we have an enzyme in our bodies that catalyzes a "reversible reaction"; one that goes either forward or backward, depending on the relative concentrations of reactants. What's the point of that? How is it that the enzyme is helpful to an organism in that case?

Question

It might seem odd that we have an enzyme in our bodies that catalyzes a "reversible reaction"; one that  goes either forward or backward, depending on the relative concentrations of reactants. What's the point of that? How is it that the enzyme is helpful to an organism in that case?

rushwr · Answer

I'm not sooo sure but then if a reaction is reversible 
Imagine that Enzyme A is catalyzing the following reaction $$A < => B $$
When A is in adequate amount the enzyme will carry out the forward reaction and forms B. But if there's no adequate amount of A then the enzyme will break down B to form A to maintain the equilibrium. Thus carrying out the reverse reaction. I'm not sure about examples. But thinking according to chemistry this would be the result.  This will help to maintain the concentrations of both the products and the reactants. I also think that this might also help in homeostasis .

rushwr · Answer

I found this link go and check for further information . http://www.ncbi.nlm.nih.gov/books/NBK9921/