How does the cell store energy?
- Cells have evolved to use the compound ATP to store energy
- ATP stands for adenosine triphosphate
- ATP --> ADP + P + energy
o The energy from this reaction can be used to power other reactions (remember, that all chemical reactions require activation energy), send signals within/between cells, actively transport materials, etc.
o (the phosphate bond stores lots of energy)
How do cells release energy from food?
- Cells CANNOT make energy! Energy is only transferred from one chemical form into another, useable one
- Glucose is decomposed into smaller molecules using enzymes
o The energy from that reaction is used to produce ATP which stores the energy until it is needed
- C6H12O6+ 6 O2 --> 6 H2O + 6 CO2 + Energy (ATP)
- There are two types of anaerobic respiration (w/o oxygen) and aerobic respiration (w/ oxygen)
o Aerobic respiration takes longer and is more complicated but produces more ATP
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