Here is the matching of the organic macromolecules with their cellular roles:
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Lipids: d. High energy value storage material and can be used for insulation and cushioning.
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Carbohydrates: b. Primary source of energy for most organisms, and are made of at least one monosaccharide.
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Proteins: a. Some types lower the energy of activation for reactions to occur more quickly, all are made up of amino acids.
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Nucleic acids: c. Used primarily for protein synthesis - determine what and who you are.