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Across 2. Atom that has lost an electron and has a positive charge 8. Form of DNA in nucleus when cell is not dividing 11. Another name for a synthesis reaction 12. International unit of weight 13. Subtype of lipid containing cholesterol and its derivatives 15. Mix with undissolved particles that will not precipitate out 18. Building blocks of nucleic acids 21. Atom that makes things organic 22. Nitrogenous base that pairs with adenine 23. Biological catalysts 24. Bond where electrons are transferred from one atom to another

Down 1. Resist drastic changes in pH 3. Nitrogenous base that pairs up with thymine 4. A solution with a pH of 7.1 to 14 5. Amount of energy to get a reaction started 6. Plant storage form of glucose we can digest 7. Versions of an atom with differing numbers of neutrons 9. Human storage form of glucose 10. Types of bonds between amino acids in a protein 14. Nitrogenous base that pairs with guanine 16. To disrupt the shape of a protein by breaking hydrogen bonds 17. Nitrogenous base in RNA but not DNA 19. Bond where electrons are shared equally 20. Another name for the H+ ion