Question

the three main functions of carbohydrates are.... (mark 3!) to be a quick source of energy long term energy storage provide cellular support as cell walls short term energy storage form cell membranes

Explanation:

Carbohydrates are broken down quickly to release energy, so they are a quick energy source. Cellulose (a carbohydrate) provides structural support in plant cell walls. Carbohydrates like glycogen (in animals) and starch (in plants) serve as short - term energy storage. Lipids (not carbohydrates) are for long - term energy storage, and phospholipids (lipids) form cell membranes.

Answer:

To be a quick source of energy, Provide cellular support as cell walls, Short term energy storage