Question

mention the role of cell wall and compare this with animal cell

Answer 1

the functions of cell wall are:
1) it provides physical structure to the plant cell.
2) contains cell sap.
3) prevents cell from rupturing if plasmolysis occurs.
4) helps the cell to remain in its place firmly.
5) does not allow large molecules to enter the cell.

animal cell membrane is selectively permeable. 
there is no cell wall
there is no fixed shape or rigidity to the cell.

etc. etc.

Answer 2

role of cell membrane
1) it gives shape and strength to plants
2) it helps the plant to stand erect
where as animals dont have cell membrane ,cell membrane is a layer outside the cell.

hope this helps