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ï§Carbon-based molecules are called organic compounds. ï§â¯By sharing electrons, carbon can ââ¯bond to four other atoms and ââ¯branch in up to four directions. ï§â¯compounds composed of only carbon and hydrogen are called hydrocarbons. ï§â¯A carbon skeleton is a chain of carbon atoms that can be ââ¯branched or ââ¯unbranched.
1 1 Chemistry of Life-Part 2Biological Molecules 2 Of the 92 naturally occurring elements, 16 are known to be important constituents of living systems.The important elements are C, H, O, N, P, S. 2 3 All important biological molecules contain carbonAll molecules that contain carbon are called organic (except for CO 2). All other molecules are _________.Carbon forms 4 covalent bonds. This allows carbon to form molecules with many different shapes. 4 Most biological molecules have a core made of carbon and hydrogen. Molecules differ in structure and function, in part, because of different functional groups.