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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Textbook Question
Chapter 6.3, Problem 3CC
MAKE CONNECTIONS Does Figure 6.10a show passive or active transport? Explain. (See Concepts 5.3 and 5.4.)
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10. What appears to be the effect of inserting a protein channel into the membrane on the
movement of molecules across the membrane?
11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar
in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the
phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning.
When a membrane protein assists in the passive transport of molecules across a barrier in the
direction down their concentration gradient (from high concentration to low concentration) it is
called facilitated diffusion. Transport proteins may also be involved in active transport where the
cell uses energy from…
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?
Q11
Chapter 6 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 6.1 - MAKE CONNECTIONS How does the second law of...Ch. 6.1 - Describe the forms of energy found in an apple as...Ch. 6.2 - Cellular respiration uses glucose and oxygen,...Ch. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.3 - How does ATP typically transfer energy from...Ch. 6.3 - Prob. 2CCCh. 6.3 - MAKE CONNECTIONS Does Figure 6.10a show passive or...Ch. 6.4 - Many spontaneous reactions occur very slowly. Why...Ch. 6.4 - Why do enzymes act only on very specific...
Ch. 6.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 6.5 - How do an activator and an inhibitor have...Ch. 6 - Choose the pair of terms that correctly completes...Ch. 6 - Prob. 2TYUCh. 6 - Which of the following metabolic processes can...Ch. 6 - If an enzyme in solution is saturated with...Ch. 6 - Some bacteria are metabolically active in hot...Ch. 6 - If an enzyme is added to a solution where its...Ch. 6 - DRAW IT Using a series of arrows, draw the...Ch. 6 - SCIENTIFIC INQUIRY DRAW IT A researcher has...Ch. 6 - SCIENCE, TECHNOLOGY, AND SOCIETY Organophosphates...Ch. 6 - FOCUS ON EVOLUTION A recent revival of the...Ch. 6 - FOCUS ON ENERGY AND MATTER Life requires energy....Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE Explain what is...
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- How is active transport different from simple diffusion? Both active transport and simple diffusion transport molecules against the concentration gradient. In active transport, molecules are moved down the concentration gradient; on the B contrary, molecules to be transported in simple diffusion are moved against the concentration gradient. In active transport, molecules are transported with the aid of transport proteins; on the © other hand, molecules to be transported in simple diffusion do not need transport proteins. In active transport, molecules that are transported does not need metabolic energy; in contrast, molecules transported in simple diffusion need metabolic energy.arrow_forwardQ1: Is the dye at equilibrium in any of these glasses? Describe how the first glass will look when the dye is at equilibrium with the water. Q2: Will diffusion mix the molecules of dye evenly through the water, or is it necessary to shake the container to get a uniform mixture? Q3: Will diffusion mix the dye faster in hot water than in cold water? Why or why not?arrow_forwardDemonstrate the listed processesarrow_forward
- For this practice problem, would the answer be c)NaCl? My reasoning behind this is because molecules under 100 Da can use simple diffusion, while nonpolar molecules and larger molecules like benzene can use channels via facilitated diffusion. However, NaCl dissociates into ions and cannot readily use diffusion?arrow_forwardthe game. And the game officially started! The game will work by team. Sakuragi and his team are placed in small submarine shrunk down to microscopic size and injected into a stained living ceili. The teams goai is to find out what is happening in the area because the object is slowly occupying the space where there are many creatures are living. They started their path on the fluid. As they continue their journey, they reached in a transparent layer. In order to make the navigational adjustment, 1. they need to identify this substance. What could be this thing? They scanned the area using an ultra telescope designed by the company that useful for their goal. Upon using the tool they have found out that it contains a wide variety of biological molecules magnification micro 2 There are polar and non - polar region. What are these biomolecules? They tried to get insidearrow_forwardWhat membrane transport family is this protein part of? What are the roles of the different domains of this protein?arrow_forward
- Ethanol or Lactic acid G3P Руruvat Glucose G3P Руruvat Acetyl-CoA Citric Acid Охaloacetatearrow_forwardElectrochemical gradients (a) power simple diffusion (b) are established by pinocytosis (c) are necessary for transport by aquaporins (d) are established by concentration gradients (e) are a result of both an electric charge difference and a concentration difference between the two sides of the membranearrow_forwardAnatomy and Physioarrow_forward
- (a)Aquaporins and membrane channel protein in plant and animal,they permit the movement of water across the membrane.Explain why this is necessary.(b) Explain the importance of cell surface membrane to cellarrow_forwardCalculate the free energy changes at 20°C for the transmembrane movement of Na and K ions using the conditions presented Figure 9.1. Assume the membrane potential is -70 mV. Use 3 significant figures. AG (Na) - AG (K) = kJ. mol ¹ kJ mol2 Aarrow_forwardAre symporters and antiporters always involved in active transport? Can't both solutes move in the same direction and be moving down their concentration gradient (and the same with antiporters)?arrow_forward
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