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A biomolecule is any organic molecule that is produced by a living organism, including large polymeric molecules such as proteins, polysaccharides, and nucleic acids.

Organic molecules consist primarily of carbon and hydrogen, nitrogen, and oxygen, and, to a smaller extent, phosphorus and sulfur. Other elements sometimes are incorporated but are much less common.

These videos look at the main biological molecules.

Next video includes: Elements in living things. Difference between organic and inorganic compounds. The properties of water that make it essential to life. The four main organic compounds.

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Estos son algunos de los verbos que aparecen en el enunciado de las actividades de la mayoría de las materias.