1. HQ1-1-2

2. 1- State two functions of the xylem tissue

3. 2- Identify the main component of the wall of a plant cell

4. 3- Which word best describes a cell wall: Impermeable Semi-permeable Freely permeable Selectively permeable

5. 4- Name two types of molecules present in the plasma membrane

6. 5- Give the meaning of hydrophobic

7. 6- State 2 functions carried out by the proteins of the cell membrane

8. 7- red blood cell in very concentrated salt solution, solution is hypertonic or hypotonic?

9. 8- What word is used to describe the effect of a hypertonic solution of sugar on red onion cells?

10. 9- What is characteristic of active transport? (2 answers)

11. Answers 1- transport of water/ minerals + Structural support to the plant 2- Cellulose 3- Freely permeable 4- lipids and proteins 5- repelled by water/ water hating 6- 7- hypertonic 8-Plasmolysed 9- requires energy + against the concentration gradient.