Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 11 - 11.1 - Concept Check - Page 217: 3


No, or at least very little. This is because glycogen phosphorylase is activated in the presence of epinephrine as the result of cell signalling inside a live, intact cell. This question asks instead about a cell-free system, which would not lead to activation. No enzyme activity, or perhaps a very small amount depending on the exact nature of the non-activated enzyme, would result.

Work Step by Step

This question wants you to see that all of the steps of cell signalling, found in a living cell, are needed for the end result, the action of an activated enzyme, to take place. The signal itself is not enough without the pathway.
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