- ATP - adenosine triphosphate
- adenosine- adenine, five carbon sugar, ribose
- triphosphate "tail" - three phosphates
- phosphate group = negative
- phosphate bonds break - potential energy is released
- cellular respiration - one tail lost, becomes adenosine diphosphate (ADP)
- phosphate group transferred from ATP to another molecule
- chemical work, mechanical work, transport work
- chemical work - building proteins
- mechanical work - contraction of muscles
- transport work - pumping solutes across cellular membrane
- ATP = recyclable
- ADP + one phosphate group = ATP
- adding phosphate requires energy from food
Concept Check
1. When one of the phosphate groups are lost during cellular respiration, it is like relaxing a spring. Here, potential energy is given off.
2. The three main types of cellular work is chemical work, mechanical work, and transport work.
3. The energy that is obtained from food enables ADP to be regenerated into ATP.
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