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Molecules: groups of atoms bonded together due to the sharing or donating of electrons

Examples: Carbon dioxide, water, NaCl, oxygen

Biological molecules (a.k.a. biomolecules, organic macromolecules, or macromolecules): large molecules that are abundantly found in living organisms and are essential for life.

There are four major types of biological molecules

  1. Carbohydrates
  2. Lipids (fats)
  3. Proteins
  4. Nucleic Acids

Other molecules may be considered biological if they are created or used by living organisms, but that is a very broad definition that would include molecules such as alcohols, gases, or inorganic compounds.

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15y ago

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