Cells do three kinds of work mechanical work ex

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Cells do three kinds of work: - mechanical work (ex. contraction of a  muscle cell) - transport work (ex. pumping of  substances across a memebrance) - chemical work (ex. synthesis of  polymers from monomers)
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    Concept 8.3 Energy coupling : the use of an  exergonic process to drive an  endergonic one ATP  is the energy source used in most  rxns. - contains a ribose (sugar), adenine  (base), and 3 phosphate molecules
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    Concept 8.3
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    Concept 8.3 Energy is released from ATP when the  terminal phosphate bond is broken ATP   ADP + P i  + Energy - work is accomplished by  phosphorylation - the transferring of the P i  to another  molecule (ex. channel protein)
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    Concept 8.3
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    Concept 8.3 ATP is regenerated in the cell by  phosphorylating ADP through an  exergonic rxn. in the cell - in a muscle cell 10 million ATP are  consumed and regenerated per second  per cell
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    Concept 8.3
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    Concept 8.4 Spontaneous rxns. May occur at very 
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