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Respiration
WHY WE RESPIRE
Cellular respiration is a process by which organisms produce ATP in a complex series of
reactions. ATP is the energy source for all metabolic reactions which occur in the cell. Energy
is needed for many bodily functions, including, muscle contraction, protein synthesis, active
transport, maintaining body…

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each cycle, three molecules of reduced NAD, one of reduced FAD and one of ATP are
produced. ATP is produced in the stalked particles on the inner mitochondrial membrane. For
each molecule of glucose that enters the glycolytic pathway, two molecules of pyruvic acid
are formed and so the Krebs…

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for example, catalyses one of the early "pump-priming" reactions, adding a phosphate group
to the 6C sugar. It is affected by the concentration of ATP and citrate form the Krebs cycle.
When there is plenty of ATP or the components of the Krebs cycle, glycolysis slows down
and vice versa.…

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