Biochemistry/Water

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Active Site

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The region on an enzyme where the substrate binds and the reaction occurs.

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Enzyme

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A protein that catalyzes chemical reactions by lowering the activation energy.

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Substrate

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The molecule upon which an enzyme acts.

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Reactant

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A substance that takes part in and undergoes change during a chemical reaction.

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Product

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A substance that is formed as the result of a chemical reaction.

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Phospholipid

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A lipid containing a phosphate group, essential for cell membrane structure.

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Hydrophobic

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Having a tendency to repel or not mix with water.

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Hydrophilic

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Having a tendency to mix with, dissolve in, or be wetted by water.

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Carbohydrates

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Organic compounds consisting of carbon, hydrogen, and oxygen, serving as a major energy source.

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Lipids

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A group of naturally occurring molecules including fats, oils, and hormones, important for energy storage and cell structure.