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Across 1. Cell boundary with the outside environment 5. Carbohydrates are also called this 9. Organisms that get their carbon by "eating" organic compounds 10. Storage of information for cell molecule 20. Ribonucleic Acid 21. Cytoplasm is 80% 22. The controlled release of chemical-bond energy from large, organic molecules 24. Get energy from sunlight (very rare) 25. 6 protons and neutrons 26. Carbon compounds dissolve easily in this 27. Nucleus, organelles that perform specific functions 28. Organisms that get their carbon from Carbon Dioxide

Down 2. Source of Raw Materials and Source of Energy 3. Chemoautotrophs were likely this lifeform on Earth 4. Main structural components of cell membanes 6. Also get energy from organic compounds (bacteria, fungi) 7. Part of a chemical reaction in which one reactant loses electron 8. Process that forms the 3-D structure of proteins 11. Carbon compound with water or an attached hydroxl group 12. Proteins that act as catalysts of metabolism 13. Use energy from oxidation of inorganic chemicals 14. Proteins are chains of this 15. The set of chemical processes that occur in cells to provide energy or nutrients 16. Use energy from sunlight 17. Process used by prokaryotic organisms to use inorganic chemical reactions as a source of energy to make larger organic molecules 18. 2 electrons complete this 19. Deoxyribonucleic Acid 23. No Nucleus, free flowing strands of DNA