Biology Terms Flashcards

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acid

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A substance that donates hydrogen ions and therefore lowers pH.

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adhesion

Back

The attraction between water molecules and molecules of a different substance.

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amino acid

Back

A monomer of a protein.

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base

Back

A substance that absorbs hydrogen ions and therefore raises pH.

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buffer

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A solution that resists a change in pH by absorbing or releasing hydrogen or hydroxide ions.

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carbohydrate

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A biological macromolecule with a carbon to hydrogen to oxygen ratio of 1:2:1; serves as energy sources and structural support in cells.

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chemical bond

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An interaction between two or more elements that results in the formation of molecules.

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chitin

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A type of carbohydrate that forms the outer skeleton of arthropods and the cell walls of fungi.

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cohesion

Back

The intermolecular forces between water molecules caused by the polar nature of water; creates surface tension.

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Disaccharide

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Two sugar monomers that are linked together by a glycosidic bond.