Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 8.4CC
How would you determine whether a specific integral membrane transporter is operating by facilitated diffusion or active transport?
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1) You are studying a transport protein. It appears to bind temporarily to the molecule to be transported. During normal transport, no energy is expended. The addition of a particular molecule that closely resembles the normally transported molecule inhibits transport. An increase in the concentration of the normally transported molecule in the presence of a constant concentration of the inhibitor increases the rate of transport. What kind of transport is described?
2) What are peripheral membrane proteins?
Which of the following membrane transport mechanism requires both the aid of proteins and the expenditure of cellular energy?
Distinguish between simple diffusion (SD), facilitated diffusion (FD), and active transport (AT) across a membrane for the following questions.
(a) Which processes are energy dependent?
(b) Which processes need some kind of carrier protein(s)?
(c) Which processes can be saturated by substrate?
(d) Which processes can establish a concentration gradient?
(e) How much energy does it take to transport an uncharged substrate in, if its starting inside concentration is 10-fold greater than outside?
Chapter 8 Solutions
Becker's World of the Cell (9th Edition)
Ch. 8 - What is the difference between the concentration...Ch. 8 - Prob. 8.2CCCh. 8 - A researcher is studying a fern that is shown to...Ch. 8 - How are carrier proteins and channel proteins...Ch. 8 - How would you determine whether a specific...Ch. 8 - Both the Na+/glucose symporter and the Na+/K+ pump...Ch. 8 - You are studying the energetics of transport of...Ch. 8 - True or False? Indicate whether each of the...Ch. 8 - Telling Them Apart. From the following list of...Ch. 8 - Mechanisms of Transport. For each of the following...
Ch. 8 - Prob. 8.4PSCh. 8 - Prob. 8.5PSCh. 8 - Prob. 8.6PSCh. 8 - QUANTITATIVE Sodium Ion Transport. A marine...Ch. 8 - Prob. 8.8PSCh. 8 - Prob. 8.9PSCh. 8 - QUANTITATIVE The Calcium Pump of the Sarcoplasmic...Ch. 8 - Inverted Vesicles. An important advance in...Ch. 8 - Ouabain Inhibition. Ouabain is a specific...
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- For each type of membrane transport, know the following:– Is a transporter protein required? If so, what type?– Is there an energy requirement, and if so, what is the energy source?– What is the relative rate of solute transport based on molecule type? On concentration gradient?– What are examples of the types of solutes transported by carriers and channels?arrow_forwardWhat would happen in each of the following cases where something related to intracellular transport is altered? Assume in each case that the protein involved is a soluble protein, not a membrane protein. State where each protein would be located and explain each of your answers. You add a signal sequence (for the Golgi) to the N-terminal end of a normally cytosolic protein. You change the hydrophobic amino acids in an ER signal sequence into other, hydrophobic, amino acids.arrow_forwardDefine and provide an example for each of the following: simple diffusion, facilitated diffusion, osmosis, passive transport and active transport.arrow_forward
- In terms of rate of transport of a molecule across a membrane , what is the difference between passive and active transport?arrow_forwardWhat characteristics distinguish facilitated diffusion from active transport?arrow_forwardWhat is the difference between active transport and passive transport?arrow_forward
- Define the terms (i) facilitated diffusion, (ii) primary active transport and (iii) secondary active transport. Identify which of these transport types the following are examples of: a) ATP/ADP translocase b) K^+ channels c) Bacteriorhodopsinarrow_forwardAll of the following are passive membrane transport processes except: (a) diffusion. (b) facilitated diffusion. (c) vesicular transport. (d) osmosis.arrow_forwardIn what direction is there a net movement of particles along their concentration gradient? Would your answers be different for facilitated diffusion compared with simple diffusion?arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license