Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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Textbook Question
Chapter 11, Problem 13TYK
Which of the following molecules is incorrectly matched with its description?
- a. scaffolding protein—large relay protein that may bind with several other relay proteins to increase the efficiency of a signaling pathway
- b. protein phosphatase—enzyme that transfers a phosphate group from ATP to a protein, causing a shape change that usually activates that protein
- c. adenylyl cyclase—enzyme attached to plasma membrane that converts ATP to cAMP in response to an extracellular signal
- d. phospholipase C—enzyme that may be activated by a G protein or receptor tyrosine kinase and cleaves a plasma-membrane phospholipid into the second messengers IP3 and DAG
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Scaffold proteins (a) release kinases and phosphatases into the extracellular fluid (b) bind G proteins to cell membranes (c) increase accuracy but slow signaling cascades (d) organize groups of intracellular signaling moleculesinto signaling complexes (e) are transcription factors found mainly in plant cells
A biochemist is designing a new drug that will mimic the shape and function of a particular intercellular signaling molecule. Therefore she must produce a molecule that will bind to the receptor protein and...
A. produce a cellular response by altering the Na+/K+ pump located near the receptor site.
B. induce a change in the receptor molecule shape, which will ultimately prevent a cellular response.
C. induce a change in the receptor molecule shape, which will ultimately produce a cellular response.
D. induce a change in the phospholipid bilayer that causes a polar reversal allowing the molecules to be endocytose (engulfed).
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 11 Solutions
Biology - Study Guide
Ch. 11 - How do plant hormones (often called plant growth...Ch. 11 - Prob. 2IQCh. 11 - Label the parts in the following diagram of an...Ch. 11 - Prob. 4IQCh. 11 - a. What does a protein kinase do? b. What is a...Ch. 11 - Prob. 6IQCh. 11 - Prob. 7IQCh. 11 - Prob. 8IQCh. 11 - a. What can one conclude from the fact that the...Ch. 11 - Prob. 1SYK
Ch. 11 - Briefly describe the three stages of cell...Ch. 11 - Some signaling pathways alter a proteins activity;...Ch. 11 - Prob. 4SYKCh. 11 - Prob. 1TYKCh. 11 - Steroid hormones a. bind to cell-surface...Ch. 11 - Prob. 3TYKCh. 11 - Prob. 4TYKCh. 11 - Which of the following is a key difference between...Ch. 11 - Many human diseases (including bacterial...Ch. 11 - Prob. 7TYKCh. 11 - If a protein is activated by the addition of a...Ch. 11 - Prob. 9TYKCh. 11 - Prob. 10TYKCh. 11 - From studying the effects of epinephrine on liver...Ch. 11 - You are a Ca2+ ion in a typical animal cell. Where...Ch. 11 - Which of the following molecules is incorrectly...Ch. 11 - Prob. 14TYKCh. 11 - Prob. 15TYK
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