912L18.1 Macromolecules Supporting Terms B

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Cellulose

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A complex carbohydrate found in plant cell walls that provides structural support.

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ATP

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Adenosine triphosphate, the main energy carrier in cells used to power cellular processes.

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Organic compounds

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Chemical compounds that contain carbon and are found in living organisms.

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Hormone

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A signaling molecule produced by glands that regulates physiology and behavior.

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Cholesterol

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A lipid molecule that helps maintain cell membrane structure and is a precursor to steroid hormones.

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Cell membrane

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A biological membrane that separates and protects the interior of the cell from the outside environment.

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Water soluble

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Able to dissolve in water; typically refers to polar substances.

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Insoluble

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Not able to dissolve in a solvent, such as water.

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Hydrophobic

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Repels water; describes molecules that do not mix well with water.

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Hydrophilic

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Attracts water; describes molecules that mix well with water.