Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 37.2, Problem 3CC
Summary Introduction
To explain:
Whether diffusion eliminates the concentration gradient of a dye which has a net charge. Refer to Figure 5.9 “The diffusion of solutes across a syntheticmembrane” in the textbook.
Introduction:
Diffusion is the movement of a solute across a semi-permeable membrane “down its concentration gradient” (from higher concentration to lower concentration).
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Chapter 37 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 37.1 - Prob. 1CCCh. 37.1 - Describe the basic pathway of information flow...Ch. 37.1 - WHAT IF? How might increased branching of an axon...Ch. 37.2 - Under what circumstances could ions flow through...Ch. 37.2 - WHAT IF? Suppose a cells membrane potential shifts...Ch. 37.2 - Prob. 3CCCh. 37.3 - How do action potentials and graded potentials...Ch. 37.3 - In multiple sclerosis (from the Greek skleros,...Ch. 37.3 - Prob. 3CCCh. 37.3 - WHAT IF? Suppose a mutation caused gated sodium...
Ch. 37.4 - Prob. 1CCCh. 37.4 - Organophosphate pesticides work by inhibiting...Ch. 37.4 - MAKE CONNECTIONS Name one or more membrane...Ch. 37 - What happens when a resting neuron's membrane...Ch. 37 - Prob. 2TYUCh. 37 - Prob. 3TYUCh. 37 - Why are action potentials usually conducted in one...Ch. 37 - Which of the following is a direct result of...Ch. 37 - Suppose a particular neurotransmitter causes an...Ch. 37 - Prob. 7TYUCh. 37 - Prob. 8TYUCh. 37 - DRAW IT Suppose a researcher inserts a pair of...Ch. 37 - Prob. 10TYUCh. 37 - FOCUS ON EVOLUTION An action potential is an...Ch. 37 - Prob. 12TYUCh. 37 - SYNTHESIZE YOUR KNOWLEDGE The rattlesnake alerts...
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- please choose correct letter and explain a bit 1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds b) disulfide bonds c) star war forces d) van der Waals forces 2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by: a) glycoproteins b) feet c) microtubules d) actin filaments True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.arrow_forwardINTERPRET DATA The figure depicts the absorption spectrum of a plant pigment. What colors or wavelengths does it absorb? What is the color of this pigment?arrow_forwardIn the absence of tension, MscL channel has an energy gap separating the closed and open states Eo = 50 kT. MscL opening is associated with a 20 nm2 in-plane protein expansion (DA). Using Excel plot its open probability (Po) as a function of membrane tension and paste the graph below. What will be the open probabilities of two MscL channels if one situates at the pole of the bacterial cell above, another in the middle?arrow_forward
- Need help pleasearrow_forward4. i)List two reasons why membrane fusion is energy demanding. ii) List the three SNARE proteins which catalyze fusion of vesicle with target membranes and specify their localizations. iii) Briefly describe the structures of SNARE proteins and SNARE complex. iv) What does botulism neurotoxins do to SNARE proteins? How do these toxins lead to muscle paralysis? 5. How does the structure of the potassium channel promote specific binding of potassium?arrow_forward5) Using FRAP (Fluorescence Recovery After Photobleaching), you can measure the diffusion rate of membrane proteins. You attach a fluorescent marker to your protein of interest, bleach a small region of the cell membrane with an intense laser light, and determine the time it takes for the bleached spot to recover fluorescent signal (see figure below). (a) (b) Bleach Laser bleaching of fluorescent marker Fluorescence intensity recovery Recovery Time How would the recovery time of your protein change if the membrane contained a higher concentration of unsaturated fatty acids? Why? How would the recovery time of your protein change if you conducted the experiment at a lower temperature? Why? How would the recovery time of your protein change if it were anchored to the membrane skeleton? Why?arrow_forward
- VISUALIZE Sketch a simple flow diagram that shows the relationships among the following: RNA, translation, DNA, transcription, and polypeptide.arrow_forwardBriefly describe the experiment carried out to demonstrate that proteins are capable of lateral movement in cell membranes.arrow_forwardIn the absence of tension, MscL channel has an energy gap separating the closed and open states Eo = 50 kT. MscL opening is associated with a 20 nm2 in-plane protein expansion (change in A). Plot its open probability (Po) as a function of membrane tension. What will be the open probabilities of two MscL channels if one situates at the pole of the bacterial cell above, another in the middle?arrow_forward
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