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Across 1. an example of a nucleic acid used to carry instructions from nucleus to ribosome for protein synthesis 4. substance that causes proteins to bend an dform a certain shape 6. glycogen and cellulose 7. idea that a spiritual, vital force existed inside living things 8. lipids that come from animals 10. a factor that can cause the denaturation of enzymes 11. these structures holdamino acieds together 12. one of the three parts of an amino acid 15. carbon has 4 of these, allows it to form 4 covalent bonds 16. reactants and products are made at equal rates 19. amount of energy needed to start a chemical reaction 21. sugars and starches 24. fats and oils 28. lipid with a ring structure, needed to make steroids 29. the job of this carbon molecule it to carry instructions to make proteins 30. type of lipid is found in cell membranes 31. the number of amino acids our body can make 32. catalysts in living things 34. model that describes how an enzyme fits with its target 35. type of fats tha thave the maximum number of hydrogen ions possible connected to the hydrogen chain 36. the light produced by fireflies is a product of this type of reaction 39. many subunits put together 41. molecule found in fatty and oils, binds to fatty acids 42. RNA that acts as an enzyme

Down 2. building blocks of nucleic acids 3. cluster of lipids and proteins that travel in blood plasma 5. breaking and reforming of chemical bonds to change substances 9. total amount of useable energy decreases as unuseable energy increases, second law of ____ 13. lipids that come from plants 14. 2 simple sugars 17. building blocks of proteins 18. many monosaccharides linked together 20. specific reactants that an enzyme acts on 22. substances changed in a chemical reaction 23. sugar made by plants during photosynthesis, C6H12O6 25. release of a molecule of water 26. amount of energy that will break a bond between two atoms 27. substance made in plants that humans are unable to digest 33. decreases activation energy and increase rate of reactions 37. addition of water to molecules 38. substances made in a chemical reaction 40. one subunit