Concept23 - Concept 6.3 ATP powers cellular work by...

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Concept 6.3 ATP powers cellular work by coupling exergonic reactions to endergonic reactions A cell does three main kinds of work: Mechanical work, such as the beating of cilia, contraction of muscle cells, and movement of  chromosomes during cellular reproduction. Transport work, the pumping of substances across membranes against the direction of  spontaneous movement. Chemical work, driving endergonic reactions such as the synthesis of polymers from  monomers. Cells manage their energy resources to do this work by  energy coupling,  the use of an  exergonic process to drive an endergonic one. In most cases, the immediate source of energy to power cellular work is ATP. ATP (adenosine triphosphate)  is a type of nucleotide consisting of the nitrogenous base  adenine, the sugar ribose, and a chain of three phosphate groups. The bonds between phosphate groups can be broken by hydrolysis.
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Concept23 - Concept 6.3 ATP powers cellular work by...

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