1. ATP Structure ATP (adenosine triphosphate) type of nucleotide
nitrogenous base adenine
sugar ribose
three phosphate groups.
Fig. 6.8a
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2. The bonds between phosphate groups can be broken by hydrolysis.
ATP -> ADP + Pi
Bonds broken = Released ENERGY
Fig. 6.8b
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3. Why such a good source of energy?
Phosphate bonds of ATP are
High-energy
Unstable (phosphates repel each other)
Weak (easily broken)
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4. Renewable Resource!
ATP can be regenerated by adding a phosphate group to ADP.
ATP used is regenerated to create more energy for the cell
Catabolism = energy from other spontaneous reactions in the cell.
Fig. 6.10
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