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Across 2. An enzyme that works in the mouth, stops working in the stomach. This is most likely due to changes in 6. One difference between proteins and carbohydrates is that proteins have this element 7. Enzymes are important biological molecules because they enable reactions to occur at lower___________________ 10. When the proteins in chicken are digested by our stomach they form 11. Nucleic acids are composed of 13. The element found in nucleic acids but not proteins 14. Proteins can be used to create ____________ tissue for movement 16. Class of organic molecules that supply "quick" energy to cells 20. Molecules that combine to make up starch 23. Biological catalyst of chemical reactions 24. A molecule found in red blood cells that holds oxygen molecules. 29. The place where the substrate attaches to an enzyme 31. When you don't consume enough calories your body will use lipids for 32. Biological molecules that store genetic information 33. A molecule that temporarily stores energy for the body to use later 34. The primary function of this molecule is to regulate the amount of glucose in the blood 35. One similarity between proteins and carbohydrates is that they are both made of monomers that form________ 36. Provide protective coverings to prevent organisms from drying out 37. A double stranded molecule that contains Carbon, Hydrogen, Oxygen, Nitrogen and Phosphorus

Down 1. Enzymes lower this 2. Enzymes are in this class of biological molecules 3. A lipid used to store energy in animals 4. A biological molecule that contains fatty acids is a 5. Lipids can be used to form this 8. Class of biological molecule that contains carbon, hydrogen and oxygen but never nitrogen 9. A biological molecule that contains carbon, hydrogen and oxygen in a 1:2:1 ratio 12. A carbohydrate composed of glucose bonded in linear rows to create a tough fiber 15. Heat can change this about an enzyme and prevent it from bonding to its substrate. 17. An element found in all organic compounds 18. A hemoglobin molecule is a polymer made of many of these monomers 19. Enzymes are considered this because they are not not changed when they catalyze a chemical reaction 21. contains the elements C H O and N 22. The monomers of lipids are 25. Organic molecules that are used in cell to cell communication 26. Steroids belong to this class of organic molecules 27. Cellulose is found in this cell part 28. Enzymes will only fit with one specific substrate, so it is often compared with this 30. A molecule made of many glucose molecules could be this