Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 9, Problem 9TY
Summary Introduction
Introduction: Cells respond to the changing environment such as light, water, nutrient that causes some changes in cell, which helps in adapting to the new environment. Cells; can also generate signal to stop their own life processes, which results into the programmed cell death.
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A scientist notices that a cancer cell line fails to die when he adds an inducer of apoptosis to his culture of cells. Which hypothesis could explain why the cells fail to die? a. The cells have a mutation that prevents the initiation of apoptosis signaling. b. The cells have lost expression of the receptor for the apoptosis-inducing ligand. c. The cells overexpress a growth factor pathway that inhibits apoptosis. d. All of the above.
What is apoptosis? a. A chemical that damages neurons b. A chemical that keeps neurons alive c. A programmed mechanism of cell death d. A machine that records neuron activity
For cellular transduction, why is it useful that phosphorylation cascades have a series of protein kinases?
a.
they amplify the original signal
b.
they always lead to the same cellular response
c.
the number of molecules used is small and fixed
d.
they are cell specific
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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- Certain cells inhibit cell division by expressing signaling molecules on their surfaces. These molecules are MOST likely involved in which of these processes? A. Anchorage dependence B. Apoptosis C. Density- dependent Inhibition D. transformationarrow_forwardEctopia occurs during ____ a. the cell proliferation stage b. apoptosis c. synaptogenesis d. the cell migration stage e. induction of the neural platearrow_forwardThe frog Xenopus laevis has often served as a model system for the study of apoptosis. Can you think of some reasons that frogs are particularly good models for the study of apoptosis?arrow_forward
- Which of the following is associated with a decrease in cell-cell interactions? Select one: a. loss of MMPs b. loss of basement membrane proteins c. increased integrin expression d. Loss of integrins e. loss of E-cadherinarrow_forwardApoptosis can occur in a cell when the cell is ________________. a. damaged b. no longer needed c. infected by a virus d. all of the abovearrow_forwardMitogens tend to ___________ Select one: a. suppress cell division b. promote cell division c. suppress protein synthesis d. promote protein degradation e. promote apoptosisarrow_forward
- Explain why and how cell signaling probably evolved. own wordsarrow_forwardWhat is the role of executioner proteins in apoptosis?a. They kill the cell by destroying its proteins.b. They function as the “death receptors” on the surface of the cell.c. They are part of the immune response that eliminates the cells.d. They cause the cell to swell and burst.arrow_forwardThis begins early in the telophase and continues after the nucleus has formed in the daughter cells. a. cytokinesis b. interphase c. apoptosis d. differentiationarrow_forward
- Based off this information will the cell get to the response step ? Please explain why or why notarrow_forwardDescribe two functions of apoptosis.arrow_forwardWhen a mitogen binds to a receptor on a cell, the signal is transported via a signaling pathway into the cell and a new cell cycle can start. Describe this signal path. Explain what would happen to this one signal path if the cell simultaneously detects that there is damaged DNA in the cell.arrow_forward
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