Carbohydrate
Glycogen degradation requires the enzyme namely

glycogen phosphorylase and phosphoglucomutase
glycogen synthase and phosphorylase
None of these
glycogen phosphorylase and glycogen-debranching enzyme

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Carbohydrate
The multistep pathways of metabolism are efficient because they

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

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