Biological Science (7th Edition)
Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 11, Problem 4TYK
Summary Introduction

Introduction:

Signal transduction is the cellular process involving binding of signaling molecule to a receptor present on cell surface and transmission through the cell triggering a cascade of events inside the cell.

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For cellular transduction, why is it useful that phosphorylation cascades have a series of protein kinases?   a. they amplify the original signal       b. they always lead to the same cellular response   c.  the number of molecules used is small and fixed   d. they are cell specific
The body produces a normal amount of testosterone. However, a particular cell you are studying has an unusually low number of testosterone receptors.  How might the cell's response to testosterone be affected by its low number of testosterone receptors?     A. The cell will activate more protein kinases in response to testosterone exposure than a cell with a normal number of testosterone receptors.   B. The cell will make less mRNA in response to testosterone exposure.     C. The cell will make less cAMP in response to testosterone exposure.       D. The cell’s response to testosterone exposure will be identical to the response of a cell with a normal number of testosterone receptors.
Briefly describe how a single signaling molecule signal is amplified inside a cell.
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