Chemistry of Life

5. the attraction of particles of the same substance
6. compounds that form extra hydroxide ions when dissolved in water
8. an enzyme that attaches to a substrate
9. a substance that reacts to prevent pH changes in a solution
12. a group of atoms held together by covalent bonds
14. substance made of bonded atoms of two or more different elements
15. an organic molecule that acts as the main energy source for cell processes
16. material that contains the information that determines inherited characteristics
17. a substance made up of atoms with the same number of protons
20. an atom or group of atoms that have an electric charge because it has gained or lost electrons
21. molecule that acts as a catalyst in biochemical reactions
23. another class of biomolecules that include fats, etc
26. a substance that forms a chemical reaction
27. the minimum amount of energy required to start a chemical reaction

1. molecule of amino acids, building blocks that link to form proteins
2. the outermost level or shell of an atom are called valence electrons
3. an organic compound that consist of a sugar, a phosphate, and a nitrogenous base
4. a natural polymer that is present in all living cells and that plays a role in protein synthesis
7. the reactant in reactions catalyzed by enzymes
10. a substance or molecule that participates in chemical reaction
11. an organic compound, whose molecules are made up of one or two chains of nucleotides
13. the attraction of particles of the same substance
18. the capacity to do work
19. a mixture in which ions or molecules of one or more substances are evenly distributed in another substance
22. compounds that form extra hydronium ions when dissolved in water
24. the smallest unit of matter that cannot be broken down by chemical means
25. sugar molecules
26. measure of how acidic or bacis a solution is