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7.1 identify that adenosine triphosphate is an energy source for nearly all cellular metabolic processes
identify that adenosine triphosphate is used as an energy source for nearly all cellular metabolic processes
- A cell does three kinds of work:
- Mechanical work such as the movement of muscle.
- Active transport in which substances are moved against their concentration gradient.
- Chemical work that would not occur spontaneously without a supply of energy.
- ATP provides the energy for this cellular work by transferring a phosphate group to an intermediate that is then “phosphorylated”. The molecule that receives the phosphate is then more reactive than the original molecule.
- ATP is regenerated from adenosine diphosphate (ADP) and inorganic phosphate (Pi) in the cellular process of respiration and photosynthesis.