Question

1. what are the elements contained in carbohydrates?
2. what is the building block of carbohydrates?
3. what is a monosaccharide?
4. how does a polysaccharide differ from a disaccharide?

there are three classes of carbohydrate polysaccharides. the first is starch. starch is a carbohydrate used in food storage in plants. potatoes, pasta and rice are rich in starch. starches are very valuable because they provide a quick form of energy for the body. the second is glycogen. glycogen is used for food storage in animals. the third is cellulose. cellulose is used for structural support in plants (stems, leaves).

1. what are the three classes of carbohydrates?
2. why should an athlete eat a big pasta dinner the night before a race?

Explanation:

1. Carbohydrates are composed of carbon, hydrogen, and oxygen.
2. The building - block of carbohydrates is monosaccharides.
3. A monosaccharide is the simplest form of carbohydrate, a single sugar unit that cannot be hydrolyzed into simpler sugars.
4. A disaccharide is made up of two monosaccharide units joined by a glycosidic bond, while a polysaccharide is made up of many (more than two) monosaccharide units linked together.
5. The three classes of carbohydrates are monosaccharides, disaccharides, and polysaccharides.
6. Pasta is rich in starch, a polysaccharide. Starch provides a quick - release form of energy for the body, which is beneficial for athletes to have energy during the race.

Answer:

1. Carbon, hydrogen, and oxygen.
2. Monosaccharides.
3. The simplest form of carbohydrate, a single sugar unit that cannot be hydrolyzed into simpler sugars.
4. A disaccharide has two monosaccharide units, a polysaccharide has many.
5. Monosaccharides, disaccharides, and polysaccharides.
6. Because pasta is rich in starch which provides quick - release energy for the body during the race.