GCSE Biology: Cellular Respiration

All cells need to make energy from food molecules. The process is called cellular respiration. All life processes require energy. This process usually requires oxygen, but not always. When oxygen is sufficient, respiraton is usually aerobic. When oxygen is in short supply, cells respire anaerobically. Anaerobic respiration is less efficient and produces less energy.

Glucose + Oxygen ==[cellular respiration]==> Energy + Carbon Dioxide + Water

Cellular respiration requires enzymes to facilitate the chemical process. The location in the cell where the process happens is called mitochondria.

The difference between cellular respiration and burning is that burning is the use of energy and cellular respiration is the release.

Respiration is a chemical process which releases energy. Chemical energy is released initially. The chemical energy is then converted into other forms, accordingly to the needs of the cell. For example, heat, electrical, light, kinetic (for movement) etc.