Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 31, Problem 2TYU
Summary Introduction

Introduction:

Auxin is the plant hormone that is responsible for promoting the coleoptiles elongation. They even have various other functions in the flowering plants. Natural auxin is called as IAA (indoleacetic acid).

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Which of the following is not a function of proteins present in theplasma membrane?a. Proteins assist the passage of materials into the cell.b. Proteins interact with and recognize other cells.c. Proteins bind with specific hormones.d. Proteins carry out specific metabolic reactions.e. Proteins produce lipid molecules.
Plant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs.  a) Describe the plant’s response to the presence of light. (refer to picture)
Signal transduction pathways benefit cells for all of the following reasons except :   a. they enable different cells to respond appropriately to the same signal.   b. they can amplify and diversify a signal.   c. they help cells use up phosphate generated by ATP breakdown.   d. they help cells respond to signal molecules that are too large or too polar to cross the plasma membrane
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