Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 37, Problem 9TYK
Summary Introduction

Introduction:

Abscisic acid (ABA) is a plant hormone that is responsible for suppressing growth. This is brought about by changing the gene expression and inhibiting growth. It is also involved in presenting a response toward environmental stresses. These stresses include drought, cold, soil salinity, and others. The response presented by ABA is a part of evolutionary adaptation.

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What type of signal transduction is involved in signaling from hormones such as estrogen and testosterone? Explain the signal transduction pathway that occurs. 1.  Is there a short term description for signal transduction, instead wrting multiple words to descripte the type of signal transduction? Can I just identify it as active signal transduction and inactive signal transduction. Based on my understanding, active singal transduction is for the fast react transdcution, while inactive signal transduction meanly refers the hormonal affacts on the system.  2. For Ion channels, specific enzymes are both involed activated and inactivated signal transduction?
Researchers have found that a certain signal transduction pathway, illustrated in the figure below, may be responsible for the development of cancer in pancreatic cells. In normal pancreatic cells, where the pathway remains inactive, a membrane-bound receptor called Ptc inhibits a downstream protein known as Smo. The inhibition of Smo blocks the activa- tion of a complex of proteins known as the HSC, which results in the cleaving of one of its proteins called Ci. The cleaving of Ci, in turn, prevents the pathway from initiating the syn- thesis of division-facilitating enzymes. A Ptc B Smo с inhibition D A model of a Ptc signal transduction pathway under normal conditions. HSC Ci cleavage A certain protein called the Hedgehog protein (Hh) is found to activate this signal transduction pathway and trigger uninterruptable cell division. cell division not initiated Which of the following describes the most plausible mechanism by which Hh triggers uninterruptable cell division? Hh binds to…
The diagram below shows a closeup of regulatory proteins binding to one of the UASG elements near the GAL7, GALI0, and GALI genes, which code for the protein products needed for yeast to use the sugar galactose. The red triangle symbolizes an "effector" molecule that binds to Gal80p. In this hypothesis (which has since been shown to be incorrect), what could be happening to Gal80p when it is bound to the effector molecule that causes it to change its position and uncover the Gal4p transcriptional activation domain. Hint: think about what effector molecules do upon binding to proteins such as the the Lac repressor protein or the CAP protein. Galactose absent, glucose absent Gal80p. _Activation domain Gal4p dimer -Binding domain UASG Galactose present, glucose absent Activation domain Gal80p- Binding domain UASG For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
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Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license