Final Answer:
1. Controls what enters and leaves the cell; protects the cell
2. protein
3. Because it looks like a mosaic (patchwork) of different parts—lipids, proteins, and carbohydrates—that are not arranged in a rigid pattern
4. a. lipid bilayer — the two layers of phospholipids
b. protein channel — the tube-like proteins that let substances pass
c. carbohydrate chains — the branched sugar chains attached to proteins or lipids on the outer surface
5. plants, fungi, bacteria
6. Provides support, protection, and shape to the cell
7. cellulose
8. control; substances
9. homogeneous mixture
10. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration until evenly spread out.
11. equilibrium
12. random; does not
13. permeable
14. Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
15. Isotonic means equal solute concentration inside and outside the cell.
Hypertonic means higher solute concentration outside the cell.
Hypotonic means lower solute concentration outside the cell.
16. water moves into the cell; swollen (turgid)
17. cell wall
18. transport proteins
19. facilitated diffusion
Parent Tip: Review the logic above to help your child master the concept of biology worksheets.
