Why is it that a different enzyme cannot be used on just any organic compound? explain.

This is due to the characteristic of specificity of the enzyme. Enzymes have active sites that only bind particular substrates which they catalyze. This is because the shape of the active site is complementary to that of the substrate  (like lock and key).

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.