Unit 3: Cells

4. Cell with no nucleus and no membrane-bound organelles.
5. The cell ____ provides structure and protection. Not present in animal cells.
8. The 'tiny organs' of the cell.
10. The same concentration of water inside and outside the cell. Cell stays at equilibrium.
12. In animal cells they are many small ones, in plants there is one large one. For storage.
14. To move a molecule against a concentration gradient, you require ______ transport, which requires ATP.
15. Converts sunlight into energy. Found in plant cells and some protists.
18. More water is outside the cell than inside. Causes the cell to expand.
19. Takes glucose and water and makes ATP.
20. A concentration ________ occurs when a substance has regions of higher concentration and lower concentration.
21. The plasma ________ separates the inside and the outside of the cell.
22. Molecules that are attracted to water, like the head of the phospholipid.
23. Molecules that repel water, like the tails of the phospholipid.

1. More water is inside the cell than outside. Causes the cell to shrivel.
2. The passive movement of molecules from high to low concentration.
3. __________ diffusion occurs with the concentration gradient, but requires a protein to pass the cell membrane.
6. Cell with membrane-bound organelles like a nucleus. Bigger and more complex.
7. Protein factory. In prokaryotes and eukaryotes.
9. Mitochondria and chloroplasts were engulfed by ancestral eukaryotes.
11. Fills up the cell, made mostly of water, jelly-like.
13. The movement of water molecules across a semi-permeable membrane to balance a concentration gradient.
16. Main component of the cell membrane.
17. Contains the cell's genetic material. Only in Eukaryotes.