Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 9, Problem 3TY
Summary Introduction
Introduction: Cell signaling involves many stepwise changes in the cell such as activation of receptor, signal transduction, and a response by the cell.
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Please choose one of these choices
A. Since protein A is embedded in the membrane., the mutation will be silent and not affect the cellular response.
B. The molecule that normally binds to protein A will not enter the cell, thus no cellular response will occur.
C. The molecule that normally binds to protein A will no longer attach, deactivating the cellular response.
D. Production if activated molecule 1 will stop, bht production of activated molecules 2 and 3 will continue.
Explain the three stages of cell signaling. a. receptor b. transduction c. response. Attach images
Lipid-soluble signaling molecules, such as testosterone, cross the membrane of all cells but only affect target cells because
a.
intracellular receptors are only present in target cells
b.
only target cells possess the cytosolic enzymes that transduce the testosterone
c.
target cells are the only cells that can initiate the phosphorylation cascade leading to the transcription factor
d.
only target cells retain the appropriate DNA segments
Chapter 9 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 9.1 - Figure 9.1 Response of a yeast cell to glucose....Ch. 9.1 - Prob. 1BCCh. 9.1 - Which type of signal, paracrine or endocrine, is...Ch. 9.1 - Prob. 3CCCh. 9.2 - Prob. 1BCCh. 9.2 - Prob. 1CCCh. 9.2 - Prob. 2CCCh. 9.3 - Prob. 1BCCh. 9.3 - Prob. 1CCCh. 9.3 - Prob. 2CC
Ch. 9.3 - In the case of signaling pathways involving...Ch. 9.5 - Prob. 1EQCh. 9.5 - Prob. 2EQCh. 9.5 - Prob. 3EQCh. 9.5 - Prob. 1CCCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 - The relay protein Ras is part of the EGF pathway...Ch. 9 - Prob. 7TYCh. 9 - Prob. 8TYCh. 9 - Prob. 9TYCh. 9 - Prob. 10TYCh. 9 - Prob. 1CQCh. 9 - Conceptual Questions What are the three stages of...Ch. 9 - Prob. 3CQCh. 9 - Prob. 1COQCh. 9 - Prob. 2COQ
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- What type of cell signaling receptor is depicted below a. Cytoplasmic Receptor b. Transmembrane Receptor c. Intracellular Receptor d. Nuclear Receptorarrow_forwardG proteins are involved wheneverA. Binding of messenger molecules to cell surface receptors triggers a target cell response.B. Binding of ligand molecules to cell surface receptors triggers activation or inhibition of enzymes,C. Binding of ligand molecules to cell surface receptors triggers synthesis of second messengers,D. Binding of ligand molecules to cell surface receptors triggers a change.E. All of the above.arrow_forwardEGF signals by binding to cell surface EGF receptors. Which of these observations, if true, would BEST explain EGF’s mechanism of action? A. EGF is hydrophilic and can easily diffuse through the cell membrane B. EGF is hydrophobic and can easily diffuse through the cell membrane C. EGF is hydrophilic and cannot diffuse through the cell membrane D. EGF is hydrophobic and cannot diffuse through the cell membranearrow_forward
- Which of the following are methods of cellular signaling? Select one: a. All the answers are correct. b. Connections through fibers of the ECM from one cell to another c. Ligand binding to a receptor in the cell membrane d. Desmosomes ‘pulling’ one cell to another e. Lipid or gas ligand binding to an intracellular receptorarrow_forwardDuring cell signaling, binding of a ligand to the outside of a cell leads to: A. A signal being sent inside the cell B. The ligand being transported into the cell C. A and B D. None of the abovearrow_forwardIn a clinical study, it was found that copaiba essential oil positively regulated multiple signaling pathways in neuronal cells. These included the following signaling pathways which regulate neuronal metabolism, proliferation and immunity: (Select all that apply.) Choose at least one answer. a. AMPK b. pI3K/Akt/mTOR c. MAPK d. JAK/STATarrow_forward
- A cell has epinephrine receptors, yet is unable to respond to epinephrine signaling. One possible reason is: A. The cell has no DNA. B. The cell is missing a functional G-protein or adenylyl cyclase. C. All of the epinephrine receptors are on the cell’s surface. (They’re supposed to be in the cytoplasm!) D. Both A and C.arrow_forwardHormones are chemical signaling molecules produced by specialized cells and transmitted via the circulatory system to all other cells in the body. Which of the following describes a condition that needs to be met for a target cell to re- ceive the signaling molecules? A B с D The size and shape of the target cell needs to be similar to that of the cell that secreted the hormone. The location of the target cell needs to be within the local region of the cell that secreted the hormone. The target cell needs to have sufficient ATP to transport the hormone into the cell. The cytosol of the target cell has to have receptors that recognize and bind the hormone.arrow_forwardDefine the following terms: a. growth factors b. cytokine c. second messenger d. enzyme cascade e. desensitizationarrow_forward
- a universal feature of cell signaling receptors is that they? a. undergo a structural (shape) change when the signal molecule is bound b. are present only in the plasma membrane c. are only ion channels d. are protein kinases e. aer only nuclear receptorsarrow_forwardThere are two types of antifolate drugs (primarily DHFR inhibitors): Classical antifolates and Non-classical antifolates. How do these two types of antifolates differ from each other? a.Mode of transport into the cell b.Natural vs synthetic c.Functionarrow_forwardIn the RAD signaling pathway the EGF ligand binds the EGF receptor, this initiated a phosphorylation cascade that results in cell proliferation. Which of the following statements is correct: a. RAS protein is the sognal b. EGF ligand is the signal c. cell proliferation is the signal d. EGF receptor is the signal e. none of the abovearrow_forward
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