Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 9.1, Problem 1CC
Figure 9.1 Response of a yeast cell to glucose. When glucose is absent from the extracellular environment, the cell is not well prepared to take up and
What is the signaling molecule in this example?
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Receptors often activate signaling molecules that are __________. This property helps to increase signaling efficiency of this pathway.
bound to the plasma membrane
floating in the cytosol
locked in the endoplasmic reticulum
inside the mitochondria
all of the above
This pertains to membrane transport and cell signaling.
Give an example in animals and in plants where the two signaling and responding cells are in direct contact.
Exposing cells to which of the following drugs would inhibit the slow output response of a cell to a signaling ligandwithout having an effect on the fast output response ?
A. Latrunculin - a molecule isolated from sponges, which binds near the nucleotide-binding cleft of monomericactin.B. Taxol - a molecule isolated from the bark of the pacific yew, which that stabilizes microtubules.C. Alpha-amanitin - a molecule isolated from deathcap mushrooms, which blocks RNA polymerase II.D. Phalloidin - a molecule isolated from deathcap mushrooms that stabilizes f-actin.E. Sodium orthovanadate - a molecule that inhibits alkaline and tyrosine phosphatases.
Chapter 9 Solutions
Biology
Ch. 9.1 - Figure 9.1 Response of a yeast cell to glucose....Ch. 9.1 - Prob. 1CSCh. 9.1 - Which type of signal, paracrine or endocrine, is...Ch. 9.1 - Prob. 3CCCh. 9.2 - Prob. 1CSCh. 9.2 - Prob. 2CSCh. 9.2 - Prob. 1CCCh. 9.3 - Prob. 1CSCh. 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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- This question pertains to membrane transport & cell signaling. Give an example of animals and plants where the two signaling and responding cells are in signaling.arrow_forwardHistamine is a chemical substance released in inflammatory and allergic response. The histamine H1 receptor is a G protein-coupled receptor that activates phospholipase C in response to the binding of histamine. Arrange the data below showing the process of histamine signal transduction from the H1 receptor. Calcium ions flow through ligand-gated ion channel. Phosphorylation cascade leads to the activation of a cellular response. Calcioum ions activate a protein, leading to a cellular response. Enzyme cleaves PIP2, forming DAG and IP3. Calcium iom concentration increases in the cytosol. IP3 binds to a ligand-gated ion channel in thw ER membrane.arrow_forwardThe structure of a plant cell wall needs to loosen to accommodate cell growth. What signaling molecule controls this process?arrow_forward
- Illustrate a complete cell signaling cascade from signal to response. Each protein in the pathways must be shown. You can choose either a GPCR or an RTK mediated pathway.arrow_forwardIn terms of cell communication, compare and contrast the action of hydrophilic versus hydrophobic ligands (signaling molecules). What type of receptor is used by these ligands? How does each type of ligand influence cell activity?arrow_forwardWhich of the following would be considered second messengers of a signaling pathway? Select one: a. A kinase enzyme b. A scaffolding protein holding three kinases c. Adenyl cyclase d. All answers are examples of second messengers e. A sugar like inositol f. Ligand gated channelarrow_forward
- Cell signaling involves only one molecule, the receptor. True Falsearrow_forwardCellular signaling follows a cascade of events and has multiple points of regulation. Which of the following could be a reason(s) why a signalling cascade is interrupted, or turned 'off', once it has been turned 'on'? A) a protein gets tagged with an ubiqutin group and gets degraded B) a chemical modification occurred on serine, threonine, or tyrosine side chains to turn on/off proteins C) allosteric regulation causes an active site to be hidden D) All of the other answers are correct E) The ligand is prevented from reaching the binding sitearrow_forwardWhich of the following signaling mechanisms is not a switch mechanism? a. Changes in phosphorylation state b. Binding of GTP c. Binding of Ca2+ ion d. Protease activityarrow_forward
- Cell signaling in plant and animal cells is similar in some ways and different in others. What are some examples of this?arrow_forwardWhich is true about signaling receptors? They are transmembrane proteins that have binding sites for extracellular activated proteinsto effect changes inside the cell. They are transmembrane proteins that have binding sites for extracellular DNA-binding proteins to effect changes inside the cell. They are transmembrane proteins that have binding sites for extracellular enzyme effectors to effect changes inside the cell. They are transmembrane proteins that have binding sites for extracellular messengers to effect changes inside the cell.arrow_forwarda 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_forward
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Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license