Carbohydrate
The multistep pathways of metabolism are efficient because they

spread the enzymes for a pathway into several different organelles
use the same enzyme for all of the substrates in the pathway
use the same substrate for all of the enzymes in the pathway
locate all of the enzymes for a pathway in the same place within the cell

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Carbohydrate
Gluconeogenesis is the

breakdown of glycogen to glucose
formation of glycogen
synthesis of glucose from non-carbohydrate precursors
breakdown of glucose to pyruvate

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