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) glycogen is broken-down into UDP-glucose D) glucose only comes from glycogen α(1,4) links and not α(1,6) branches E) none of the above
The answer is B a net 2 ATPs are always generated per glucose regardless of its source
Explanation
Glycogen breaks down in the muscle so as to have enough glucose for muscle contraction and it produces 2ATPs
Glycogen also breaks down in the liver to release enough glucose which gets to the blood stream and is then taken up by other cells. It also produces 2ATPs at the expense of 6ATPs
