Which enzyme is primarily responsible for initiating glycogenolysis?Question 13Answera.Glycogen synthaseb.Glycogen phosphorylasec.Hexokinased.Glucokinase

An enzyme used in gluconeogenesis but NOT glycolysis is:Group of answer choicesglucose 6-phosphatasephosphofructokinase-1pyruvate kinasehexokinase

Which of the following pair of enzymes are involved in the synthesis of glycogen?Group of answer choicesGlycogen synthase and amylo (1→4) to (1→6) transglycosylaseGlycogen synthase and oligo (1→6) to (1→4) glucantransferaseGlycogen phosphorylase and amylo (1→4) to (1→6) transglycosylaseGlycogen phosphorylase and oligo (1→6) to (1→4) glucantransferase

Which of the following enzymes are most likely to be regulated in glycolysis?Group of answer choicesA) all enzymes in glycolysis are potential regulation pointsB) enzymes that catalyze reversible steps are most likely to be regulatedC) hexokinase and pyruvate kinaseD) the first three enzymes of the pathway, since regulation is most efficient if it occurs at the beginning of a pathwayE) enzymes like aldolase, which catalyze big chemical changes like cleavage of C—C bonds

The phosphorylation of glucose to glucose-6-P in the glycolysis pathway is catalyzed by glucokinase. Which enzyme in the gluconeogenesis pathway catalyzes the reverse reaction (G6P > Glucose)? A. Glukose-6-fosfatase / Glucose-6-phosphatase B. Piruvaatkinase / Pyruvate kinase C. Heksokinase / Hexokinase D. Fosfofruktokinase / Phosphofructokinase E. Fruktose-1,6-bifosfatase / Fructose-1,6-bisphosphatase

Concernant la régulation de la glycogénolyse, retenir la bonne réponse :ALe glucagon active la glycogène phosphorylase kinase.BLa glycogène phosphorylase ne peut être phosphorylée que dans l'état R relâché.CLa forme déphosphorylée de la glycogène phosphorylase est très active.DL'ATP est un activateur allostérique de la glycogène phosphorylase.ELa protéine phosphatase active la glycogène phosphorylase.