2.2.6—Cellular respiration
- Syllabus
- First assessment 2026
- Objective
- 2.2.6
- Level
- HL
Respiration Makes Energy Usable
Aerobic respiration transforms glucose and oxygen into carbon dioxide, water and usable chemical energy for cell processes.
Cells use this energy for movement, growth and repair. Respiration is a chemical process in all living organisms, including plants.
A plant respires at night and in daylight, using glucose made or stored by photosynthesis.
No. Breathing exchanges gases; respiration is the cellular chemical transformation.
Plants respire in light as well as darkness.