Describe the differences in structure and function between a cell wall and a cell membrane.

Mark scheme

Marking points from the official mark scheme (May/June 2016). The mark or mark type is shown in brackets.

1. [max 6] structure: 1. cell wall thick/cell membrane thin ;
2. 2. cellulose in cell wall;
3. 3. fat/protein in cell membrane ;
4. 4. cell wall surrounds OR protects cell membrane ORA ;
5. function: 5. wall permeable + membrane semi-permeable AW ;
6. 6. cell wall no control/cell membrane has control over what enters cell;
7. 7. cell wall involved in turgor/support/protection/shape /prevents bursting;
8. 8. osmosis (only) through membrane;
9. 9. active transport (only) through membrane;
10. [max 3] 1. (cell) the unit of life AW ;
11. 2. tissues are made up of cells AW;
12. 3. cells in tissues have common/specific function;
13. 4. organs are made up of tissues AW;
14. 5. working/combining together;
15. [1] 6. one example each of a named cell identified as such + a named organ identified as such; A for tissue examples including: blood, muscle, nervous, epithelial, connective, xylem, phloem, palisade, epidermis A for organ examples including: muscle, heart, leaf, flower, root, stem