Cell Function

2. small, circular piece of DNA located in the cytoplasm of many bacteria
4. converts light energy to chemical energy
5. any of a number of organized or specialized structures within a living cell.
8. Control center of the cell
11. Powerhouse of the cell
13. apparatus A system of membranes that modifies and packages proteins for export by the cell
14. A long, hairlike structure that grows out of a cell and enables the cell to move.
15. membrane a microscopic membrane of lipids and proteins that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm.
17. Makes proteins
18. Produce hydrogen peroxide; detoxify harmful substances
20. wall strong, supporting layer around the cell membrane in some cells

1. unicellular organism that lacks a nucleus
3. microfilaments, intermediate filaments, microtubules
6. ER ER that is dotted with ribosomes
7. Cell organelle that stores materials such as water, salts, proteins, and carbohydrates
9. the portion of the cell outside the nucleus
10. Hairlike projections that extend from the plasma membrane and are used for locomotion
12. organism whose cells contain a nucleus
16. An organelle containing digestive enzymes
19. ER That portion of the endoplasmic reticulum that is free of ribosomes.