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Across 1. cellular organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris 4. In cell biology, this is a specialized subunit within a cell. 6. Supports the tube and connects it to the base 9. Proteins that are permanently connected to the cell membrane. 11. The bottom of the microscope, used for support 14. uses a beam of electrons to illuminate a specimen and produce a magnified image 16. What we hope to solve with cell theory. 17. The idea that all living things are composed of cells. 18. The flat platform where you place your slides. Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it up and down. 19. invisible to a microscope. 21. A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage. 22. Connects the eyepiece to the objective lens 23. a thin polar membrane made of two layers of lipid molecules. 24. These are involved in the synthesis of proteins and is also a membrane factory for the cell

Down 2. solely regulates calcium levels. 3. are involved in the synthesis of lipids. 5. the lens at the top that you look through. 7. This has different sized holes and is used to vary the intensity and size of the cone of light that is projected upward into the slide. 8. This is a large complex of RNA and protein which catalyzes protein translation, 10. they generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy. 12. This is a membrane-enclosed organelle found in eukaryotic cells. the "Brain" of a cell 13. This packages proteins inside the cell before they are sent to their destination 15. not bonded strongly to the membrane. They just sit on the surface 20. This is the part that holds two or more objective lenses and can be rotated to easily change power.