Dehydration Synthesis and Hydrolysis: Carbohydrates, proteins, and lipids are all synthesized and broken down by the same types of reactions. In dehydration synthesis, a hydrogen ion (H+) from one molecule joins with a hydroxyl group (OH-) from another molecule to form water (H2O), leaving the two molecules bonded to the same oxygen atom. For example, when two molecules of glucose are joined by dehydration synthesis, they form maltose and water (see below). In hydrolysis, complex organic molecules are broken down by the addition of the components of water - H+ and OH-. Both dehydration synthesis and hydrolysis require certain conditions of pH and temperature and the presence of particular enzymes.
Briefly compare and contrast the dehydration synthesis and hydrolysis reactions.