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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.
2.3 Carbon-Based Molecules Four main types of carbon-based molecules are found in living things. â¢ Carbohydrates are made of carbon, hydrogen, and oxygen. âCarbohydrates include sugars and starches. âMonosaccharides are simple sugars. âPolysaccharides include starches, cellulose, and glycogen.