14. Refer to the figure below Outside of cell Epinephrine Activated G protein su

Question

14. Refer to the figure below Outside of cell Epinephrine Activated G protein subunit Epinephrine Cell membrane receptor -Act Nated adenylyl cyclase ATP CAMP Active glycogen synthase nactive protein kinase A Active protein kinase A Inactive synthase Inactive phosphorylase kinase Active phosphorylase kinase nactive gycogen phosphorylase Active glycogen phosphorylase Grogan Glucose 1-phosphate Inside of cel Blood glucose Outside of O The figure shows a signal transduction pathway in a cell. How does the number of molecules change as the signal is carried in this pathway? O The number of molecules maintains a constant of one-to-one signaling up to the point of cAMP production, then declines gradually O The number of molecules gradually increases up to the point of cAMP production, then increases exponentially O The transfer of signal from one step to the next is a linear process throughout the entire pathway with one molecule signaling the next O The transfer of signal from one step to the next is a random process with no specific trend in quantity of molecules produced at any given step The number of molecules gradually increases up to the point of CAMP production, then remains constant.

Explanation / Answer

The number of molecules gradually increases upto the point of cAMP production, then increases exponentially. This is so because cAMP allows for the amplication of the signals many times.

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