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Which type of molecule includes a long chain carbon backbone

User Styphon
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Answer:

Although lipids have a "backbone," they are not true biological polymers as their backbone is a three carbon molecule, glycerol, with longer substituent "side chains." For this reason, only proteins, carbohydrates, and nucleic acids should be considered as biological macromolecules with polymeric backbones.

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User Adrian Preuss
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