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1.3. The immediate principles or biomolecules

The immediate principles or biomolecules

If a physical analysis of living matter is carried out, so that we can separate each of the substances that compose it without them being altered, we arrive at the so-called immediate principles or biomoleculesThe methods used for this analysis are evaporation, filtration, distillation, dialysis , crystallization, electrophoresis, and centrifugation.

The immediate principles can be:

  • Simple: when the molecules are made up of atoms of the same chemical element, as in the case of oxygen (O 2 ) and nitrogen (N2).
  • Compounds: when molecules are made up of atoms of different elements, such as water (H 2 O). Compound immediate principles can be:

Immediate principles

Simple

Molecular oxygen (O2) and molecular nitrogen (N2)

Compounds

Inorganic

Water, carbon dioxide and mineral salts

Organic

Carbohydrateslipidsproteins and nucleic acids

The immediate principles may have different functions:

The water and mineral salts are discussed below , as well as the properties of true solutions and colloidal dispersions. Carbohydrates, lipids, proteins, and nucleic acids are covered in the following topics.

Fundamental ideas about biomolecules or immediate principles

Biomolecules are the molecules that make up living things.

Biomolecules can be:

  • Simple: they  are made up of atoms of the same chemical element, such as oxygen (O2) and nitrogen (N 2).
  • Composite: they  are made up of atoms of different elements.