Answer:
There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
Explanation:
<span>The answer is: molecule; carbohydrate. A six-carbon sugar is an example of a molecule that can join with other molecules to form a carbohydrate such as starch or cellulose. The basic unit of carbohydrate is monosaccharide. A six carbon sugar would be an example of a monosaccharide. And it can join with other simple sugars (monosaccharides) to form polysaccharides, such as starch or cellulose.</span>
