BioCoach ActivityBack to BioCoach Main
BioCoach Contents
Building Biomolecules
Concept 1: CHNOPS: The Six Most Abundant Elements of Life
   Practice (1 page)
   Review (1 page)
Concept 3: Organic Molecules: Hydrocarbons
   Practice (1 page)
   Review (1 page)
Concept 4: Isomers
   Review (3 pages)
Concept 5: Polarity
   Review (2 pages)
Concept 6: The Functional Groups
   Practice (2 pages)
   Review (5 pages)
Concept 1: CHNOPS: The Six Most Abundant Elements of Life
Most biological molecules are made from covalent combinations of six important elements, whose chemical symbols are CHNOPS.
Biological molecules, or biomolecules, are built by joining atoms through covalent bonds.

Although more than 25 types of elements can be found in biomolecules, six elements are most common. These are called the CHNOPS elements; the letters stand for the chemical abbreviations of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
Table of CHNOPS Atoms