Final answer:
Carbohydrates are the biomolecules that serve as a source of stored energy and also form part of the cell's structure.
Step-by-step explanation:
The biomolecule that serves as a source of stored energy and forms part of the cell's structure is carbohydrates.
Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen atoms. They are the main energy source for cells and provide structural support to cells and tissues. Examples of carbohydrates include sugars, starches, and cellulose.
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