Science

4. flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
5. strong, supporting layer around the cell membrane in some cells
6. organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy
8. internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled
12. unicellular organism that lacks a nucleus
14. property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane
16. Concept that states that all living things are composed of cells; the basic unit of structure, all cells are made from existing cells
17. in cells, structure that contains the cell's genetic material in the form of DNA
18. fluid portion of the cell outside the nucleus

1. cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use
2. cell organelle that stores materials such as water, salts, proteins, and carbohydrates
3. cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis
6. basic unit of all forms of life
7. thin, flexible barrier that surrounds all cells;regulates what enters and leaves the cell
9. cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell
10. organism whose cells contain a nucleus
11. specialized structure that performs important cellular functions within a eukaryotic cell
13. organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell
15. network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement