![]() ![]() Sucrose is a disaccharide, containing both fructose and glucose. Disaccharides contain two monosaccharides. Monosaccharides can be joined to make larger molecules. The simplest carbohydrates are called monosaccharides. The problem of drawing three-dimensional configurations on a two-dimensional surface, such as a piece of paper, has been a long-standing concern of chemists.Carbohydrates are commonly described as sugars, or saccharides, from the Greek word for sugar. ![]() ![]() Often the simplest way to check is to construct a molecular model corresponding to each projection formula, and then compare the two models. It is important that you be able to determine whether two apparently different Fischer projections represent two different structures or one single structure. When studying this section, use your molecular model set to assist you in visualizing the structures of the compounds that are discussed. Sugars not oxidized by Tollens' or other reagents. Sugars oxidized by Tollens' reagent (or Benedict's or Fehling's reagents). Sugars having a ketone function or an acetal equivalent. Sugars having an aldehyde function or an acetal equivalent. ![]() Several classifications of carbohydrates have proven useful, and are outlined in the following table. Aside from the sugars and starches that meet this vital nutritional role, carbohydrates also serve as a structural material (cellulose), a component of the energy transport compound ATP/ADP, recognition sites on cell surfaces, and one of three essential components of DNA and RNA.Ĭarbohydrates are called saccharides or, if they are relatively small, sugars. The carbohydrates are a major source of metabolic energy, both for plants and for animals that depend on plants for food. O_n + nO_2\]Īs noted here, the formulas of many carbohydrates can be written as carbon hydrates, \(C_n(H_2O)_n\), hence their name. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |