Here are the answers to the questions:
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A macromolecule made up of mainly carbon and hydrogen atoms that is primarily used for energy storage and in cell membranes. a. Lipid
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A macromolecule that contains carbon, hydrogen, oxygen, and nitrogen, which is used by the body for growth and repair. g. Protein
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This is the repeating structural unit that forms RNA and DNA. e. Nucleotide
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This is a molecule with a large molecular mass. Many examples come from biology and in particular biochemistry. b. Macromolecule