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Polymers, carbohydrates and lipids GapFill

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are small molecules which join together to form polymers. Some examples include:

  • , which form carbohydrates

  • amino acids, which form

  • , which form DNA and RNA
  • Molecules often join together in reactions, and can be separated by under the action of water.

    There is a range of different carbohydrates used in nature, but many are based on the six-carbon sugar , which comes in both an alpha form and a beta form. When two of these molecules form bond, the disaccharide maltose is formed. Alternatively, sucrose is formed when join. An example of a longer carbohydrate, called a polysaccharide, is , which is used as a storage molecule in animals because it is highly branched and insoluble.

    , which can be identified with a positive result of the emulsion test, are also good storage molecules. Triglycerides consist of a molecule bonded to three fatty acids by ester bonds. are similar structures, but one of the fatty acids is replaced by a phosphate group, which means they are molecules. They form a in cell membranes, with the fatty acids facing away from the water.

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