A theory is a proposed explanation for an observation
Answer:
a nitrogen containing base, a pentose (five-carbon) sugar, and one or more phosphate groups
Explanation:
found this information on, newworldencyclopedia.com
Lipids serve as structural components of cell membranes, function as energy storehouses, and function as important signalling molecules. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.
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