ATP. The potential energy is stored in the high-energy phosphate bonds due to the negative charges of each phosphate repulsing each other. Cells break the phosphate-phosphate bonds when they use ATP, so the released energy is used to do kinetic work.
Single circular piece of DNA
I believe a peccary is a placental because its fetuses are fed via placenta.
A competitive inhibitor will stop the reaction from happening because it blocks out the hydrolase from the enzyme, and a noncompetitive will try to block it but in a different way. The noncompetitives change the shape of the enzyme active site so that the hydrolase cant bond with it.