Carbohydrate
The hormones, glucagon and epinephrine, stimulate glycogen breakdown to G-6-P

using ATP as the phosphoryl donor
only in the liver
indirectly, by first stimulating adenylate cyclase to make cAMP
directly, by binding to glycogen phosphorylase

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Carbohydrate
Which of the following does not occur during gluconeogenesis?

The conversion of PEP to fructose bisphosphate
The conversion of pyruvate to phosphoenolpyruvate (PEP)
The carboxylation of pyruvate to oxaloacetate
The decarboxylation of oxaloacetate to phosphoenolpyruvate

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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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