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Home > Subjects > Biology > Level 2 > 2.4 Cell biology > Subject content

  • Subject: Biology
  • AS: 91156
  • Level: 2
  • Credits: 4
  • External

Biology 2.4 Demonstrate understanding of life processes at the cellular level

Subject content

1.  Cells include plant cells and animal cells.

2.  Life processes at the cellular level include:

  • photosynthesis
  • respiration
  • cell division (DNA replication and mitosis as part of the cell cycle).

3.  Understanding of the structure of DNA, and the meaning of semi-conservative replication as part of cell division, is expected.

4.  Biological ideas, as they relate to each of the life processes at the cellular level, are selected from:

  • movement of materials (including diffusion, osmosis, active transport)
  • enzyme activity (specific names of enzymes are not required)
  • factors affecting the process
  • details of the processes only as they relate to the overall functioning of the cell (specific names of stages are not required)
  • reasons for similarities and differences between cells such as cell size and shape, and type and number of organelles present.

5.  Factors affecting the processes may include the direct availability of resources (e.g. sunlight, water, CO2 are all needed for photosynthesis) as well as the indirect affect of factors that affect enzyme activity within cells (e.g. temperature, pH, substrate, concentration, co-enzymes, enzyme poisons).

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