Verified answer

Dehydration is when two molecules come together to produce a water (by bonding OH and H so you have H2O.) Hydrolysis is doing that in reverse. Breaking the H2O into H and OH and therefore breaking the bond.

Dehydration means to take water out. Thus when you use dehydration synthesis, you are building something up while taking water out. In carbohydrates, an H from one carbohydrate and an OH from another are taken out. They form water. The two carbohydrates are then joined together by a bond called a glycosidic linkage.

Hydrolysis is simple the reverse of dehydration synthesis. You add water to a molecule to break it down.

If dehydration synthesis continues for a long time, a long and complex carbohydrate chain called a polysaccharide is formed.