Problem:
True or false. If it is false, please explain why.
Question 1: Phosphatases remove phosphates from their substrate by phosphorolysis, while kinases add phosphates to their substrates by phosphoryl transfer from ATP.
Question 2: Control of carbon flux through the glycolytic pathway occurs through the regulation of enzymes that catalyze reactions with large free energy drops.
Question 3: Different kinases phosphorylate the enzymes glycogen phosphorylase and glycogen synthase to maximize their activity.
Question 4: glycogen provides a tyrosine residue for initiating glycogen chains.
Justify your answers.