I l. In muscles, ATP is generated by glycolysis from two sources of glucose. One source is glucose that is broken down from glycogen stored in the muscles, and the other is from glucose that is taken up from the blood. Which of the following statements is true? A) A net 3 ATPs are generated per glucose from glycogen instead of a net of 2 ATPs from glucose taken up from the blood B)a net 2 ATPs are always generated per glucose regardless of its source C) D) glucose only comes from glycogen α(1,4) links and not α(1,6) branches E) none of the above glycogen is broken-down into UDP-glucose 12. Which of the following enzymes in the glycolysis are allosterically regulated? A) pyruvate kinase and GAPDH (glyceraldehyde 3-phosphate dehydrogenase) B) hexokinase and aldolase C)pyruvate kinase and phosphofructokinase D) enolase and phosphofructokinase E) hexokinase and GAPDH (glyceraldehyde 3-phosphate dehydrogenase) 13. Insulin and glucagon oppositely regulate blood glucose levels. A) When blood glucose is high, glucagon is released and causes the liver to make glycogen B) When blood glucose is low, glucagon is released and causes the liver to make glycogern C) When blood glucose is low, glucagon is released and causes the liver to break down glycogen D) When blood glucose is high, insulin is released and causes the liver to break down glycogen E) When blood glucose is low, insulin is released and causes the liver to break down glycogen