Question

1a. Both phosphorylases a and b exist in an equilibrium between the R and T states. Which phosphorylase state is the MOST active?

                a.            phosphorylase b in the T state

                b.            phosphorylase a in the R state

                c.             both phosphorylase a and phosphorylase b in the R state

                d.            phosphorylase a in the T state

                e.            phosphorylase b in the R state

1b. This energy source is used to regenerate ATP from ADP and P i. (Overall source.)

                a.            reduction of pyruvate to acetyl CoA

                b.            oxidation of carbon to CO2

                c.             electrochemical potential of stored glycogen

                d.            hydrolysis of glycerol 3-phosphate

                e.            reduction of pyruvate to lactate

Answer 1

The correct answer is

1a;B :phosphorylase a in the R state

1bA:

reduction of pyruvate to acetyl CoA