Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 11.1, Problem 3CC
Summary Introduction
To determine: If a cell-free mixture of epinephrine, glycogen phosphorylase and glycogen would produce glucose-1-phosphate.
Introduction:
Cell signaling requires a good amount of enzymes, precursor and intermediate products that lead to the production of the desired substrate. This cannot be achieved in a cell-free environment because of the absence of the required intermediates.
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is this stement false?
Intracellular concentrations in resting muscle are as follows: Fructose-6-phosphate (1.0 mM)Fructose-(1-6)-bisphosphate (10.0 mM)AMP (0.1 mM)ADP (0.5 mM)ATP (5.0 mM)Pi (10.0 mM)Under the above conditions the Phosphofructokinase reaction in muscle is more exergonic than under standard conditions.
Which statements are true? Explain why or why not.1 All second messengers are water-soluble and dif-fuse freely through the cytosol.2 In the regulation of molecular switches, proteinkinases and guanine nucleotide exchange factors (GEFs)always turn proteins on, whereas protein phosphatasesand GTPase-activating proteins (GAPs) always turn pro-teins off.3 Most intracellular signaling pathways providenumerous opportunities for amplifying the responses toextracellular signals.4 Binding of extracellular ligands to receptor tyro-sine kinases (RTKs) activates the intracellular catalyticdomain by propagating a conformational change acrossthe lipid bilayer through a single transmembrane α helix.5 Protein tyrosine phosphatases display exquisitespecificity for their substrates, unlike most serine/thre-onine protein phosphatases, which have rather broadspecificity.6 Even though plants and animals independentlyevolved multicellularity, they use virtually all the same sig-naling proteins and second…
. Intracellular concentrations in resting muscle are as follows: fructose-
6-phosphate, 1.0 mM; fructose-1,6-bisphosphate, 10 mM; AMP, 0.1
mM; ADP, 0.5 mM; ATP, 5 mM; and P;, 10 mM. Is the phosphofruc-
tokinase reaction in muscle more or less exergonic than under stan-
dard conditions? By how much?
Chapter 11 Solutions
Campbell Biology
Ch. 11.1 - Explain how signaling is involved in ensuring that...Ch. 11.1 - In liver cells, glycogen Phosphorylase acts in...Ch. 11.1 - Prob. 3CCCh. 11.2 - Prob. 1CCCh. 11.2 - WHAT IF? What would the effect be if a cell made...Ch. 11.2 - MAKE CONNECTIONS How is ligand binding similar to...Ch. 11.3 - What is a protein kinase, and what is its role in...Ch. 11.3 - When a signal transduction pathway involves a...Ch. 11.3 - What is the actual signal that is being transduced...Ch. 11.3 - WHAT IF? If you exposed a cell to a ligand that...
Ch. 11.4 - How can a targct cell's response to a single...Ch. 11.4 - WHAT IF? If two cells have different scaffolding...Ch. 11.4 - Prob. 3CCCh. 11.4 - Prob. 4CCCh. 11.5 - Give an example of apoptosis during embryonic...Ch. 11.5 - WH AT IF? If apoptosis occurred when it should...Ch. 11 - What determines whether a cell responds to a...Ch. 11 - How are the structures of a GPCR and an RTK...Ch. 11 - What is the difference between a protein kinase...Ch. 11 - What mechanisms in the cell terminale its response...Ch. 11 - What is an explanation for the similarities...Ch. 11 - Binding of a signaling molecule to which type of...Ch. 11 - The activation of receptor tyrosinc kinases is...Ch. 11 - Lipid-soluble signaling molecules, such as...Ch. 11 - Consider this pathway: epinephrine G...Ch. 11 - Apoptosis involves all but which of the following?...Ch. 11 - Which Observation suggestcd to Sutherland the...Ch. 11 - Prob. 7TYUCh. 11 - DRAW IT Draw the following apoptotic pathway,...Ch. 11 - EVOLUTION CONNECTION Identify the evolutlonary...Ch. 11 - Prob. 10TYUCh. 11 - SCIENCE, TECHNOLOGY, AND SOCIETY The aging process...Ch. 11 - WRITE ABOUT A THEME: ORGANIZATION The properties...Ch. 11 - SYNTHESIZE YOUR KNOWLEDGE There are five basic...
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