Joseph Yanna Unit 2

3. smallest structure in a cell
4. molecule that repels water
5. membrane ability to pass and exit cell
7. substance that is formed as a result of a chemical reaction or process
9. a group of cells that work together to perform a function
11. moving from an area of higher concentration to an area of lower cocentratio
14. speeds up a chemical reaction
16. the movement of water
17. movement from a lower concentration to a area of higher concentration
18. related parts that function together as a whole
19. atoms that are bonded together
20. smallest unit capable of carrying life functions

1. specific region on an enzyme
2. a group of organs that work to perform a function
6. minimum amount of energy needed to start a chemical reaction or to get molecules to react
7. movement of molecules across a cell membrane without requiring energy
8. surface where an organism lives and grows
10. molecules that do not mix with water
12. a protein that has lost its shape
13. smallest unit of matter
15. form the cell membrane
18. a group of tissues that perform a function