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Across 2. bonds between hydrogen and oxygen atoms to form water 3. high-energy molecule that contains, within its bonds, energy that cells can use 6. Many sugars 8. composed of carbon, hydrogen,and oxygen; includes sugars and starches 11. Atoms in the molecule have unequal pulls on the electrons they share. 12. Polar molecules form when atoms in the molecule have unequal pulls on the electrons they share 13. electrons that go together 14. substance that decreases activation energy and increases reaction rate in a chemical reaction

Down 1. oxygen and hydrogen atoms. It is polar 4. composed of amino acids linked by peptide bonds; folds into a particular structure depending on bonds between amino acid 5. An atom that has gained or lost one or more electrons. 7. the basis of most molecules that make up organisms 8. processes life support 9. The structure of carbon gives it unique bonding properties. 10. A simple sugar