Question

Let’s assume that one molecule of epinephrine binding to the cell activates one G-protein, which activates one adenylate cyclase. From there, assume that every enzyme catalyzes 10 reactions (for example, each activated adenlylate cyclase produces 10 molecules of activated cAMP dependent protein kinase). Finally, assume that each activated glycogen phosphorylase “frees” 10 molecules of glucose to be released from the cell into the bloodstream.

Consider that the epinephrine is only present when you see the jaguar, so prior to that there is no epinephrine to bind. After the epinephrine is in the bloodstream, the number of bound epinephrine reaches a maximum when all the receptors are full. 2. Suppose that there are 100 epinephrine receptors on the cell. Write an equation for the amount of glucose as a function of the amount of bound epinephrine.

Answer 1

As we can see from the figure that 1 epinephrine molecules binding leads to release of 100 glucose molecules in the blood

Given that there is 100 epinephrine receptor on the cell and all those are saturated upon epinephrine binding which means that 100 epinephrine.

So the equation will be 1 epinephrine = 100 glucose