Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 6P
Propose an experiment that would distinguish pore-mediated diffusion (e.g., by gramicidin) from carrier-mediated diffusion (e.g., by valinomycin).
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Propose an experiment that would distinguish pore-mediated diffusion (e.g.,by gramicidin) from carrier-mediated diffusion (e.g., by valinomycin).
Using appropriate examples, distinguish between passivetransport and facilitated diffusion.
Which of the following statements is correct about passive diffusion? Select one: A) It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient).
B) It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient).
C) It requires an expenditure of energy by the cell.
D) It may require a transport protein.
E) It involves movement of molecules down a concentration gradient and may require a transport protein.
Chapter 10 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 10 - Prob. 1PCh. 10 - Given these molecular components--glycerol, fatty...Ch. 10 - The classic demonstration that cell plasma...Ch. 10 - The lipid portion of a typical bilayers is about...Ch. 10 - In the following situations, what is the free...Ch. 10 - Propose an experiment that would distinguish...Ch. 10 - Prob. 7PCh. 10 - Peptide hormones (such as insulin) must bind to...Ch. 10 - Prob. 9PCh. 10 - Prob. 10P
Ch. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - The concentration of glucose in your circulatory...Ch. 10 - ATP is synthesized from ADP, Pi , and a proton on...Ch. 10 - The Na+/ glucose symport transports glucose from...Ch. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - The transport of aspirin (pKa = 3.5, structure...Ch. 10 - Prob. 21P
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- Usually , rates of diffusion vary inversely with molecular weights; so smaller molecules diffuse faster than do larger ones. In cells, however, calcium ion diffuses more slowly than does cAMP. Propose a possible explanation.arrow_forwardWhat is the difference between simple and facilitated diffusion? Facilitated by which type of molecule does the term “facilitated” mean?arrow_forwardWhich of the following arrangement based on the increasing order of motion is correct?a) Uncatalysed transverse motion, transverse diffusion catalyzed by flippase, uncatalysed lateral diffusionb) Uncatalysed lateral diffusion, uncatalysed transverse motion, transverse diffusion catalyzed by flippase,c) Uncatalysed transverse motion, uncatalysed lateral diffusion, transverse diffusion catalyzed by flippased) Transverse diffusion catalyzed by flippase, uncatalysed lateral diffusion, uncatalysed transverse motion,arrow_forward
- Which of the following statements is correct about passive facilitated diffusion? (select all that apply) V It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient). O It requires a transport protein. O It requires an expenditure of energy by the cell. O It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient). O It involves movement of molecules up a concentration gradient and requires a transport protein.arrow_forwardDefine 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_forwardWhich of these answers explains why synaptic vesicles only releasee their neurotransmitter cargo in response to a signal? A) the necessary Rab proteins are not synthesized until an action potential arrives B) vesicle formation at the trans-Golgi network cannot occur in the absence of plasma membrane depolarization C) an additional protein, synaptotagmin, makes vesicle fusion dependent on the calcium concentration D)a plasma membrane transporter is needed to actively pump neurotransmitter into the synaptic cleft. These are inactive until membrane depolarizationarrow_forward
- Dr Renko studied diffusion of tracer molecules to study paracellular diffusion across an epithelial monolayer of Caco-2 cells. The tracers were fluorescently labelled dextran molecules of different molecular weight. She is screening various drugs to determine whether they affect the cells in any way. Which drugs are most likely to change paracellular diffusion? a.) Drugs that modify microvilli are the most likely to change paracellular diffusion b.) Drugs that modify gap junctions are the most likely to change paracellular diffusion c.) Drugs that modify with aquaporins are the most likely to change paracellular diffusion d.) Drugs that modify tight junctions are the most likely to change paracellular diffusionarrow_forwardExplain the differences between facilitated diffusion and grouptranslocation.arrow_forwardWhat are the effects of the different agar concentrations, the temperature, and the dye types on the rate of diffusion? How do these factors mediate in the observed diffusion?arrow_forward
- Can you help me to explain every question with these answer?arrow_forward1.) Select/highlight the statements that are TRUE regarding simple diffusion. a) It is a form of passive transport. b) It is how glucose travels across the cell membrane C) It is used to transport larger molecules such as polysaccharides. d) It is the method used to transport small, nonpolar molecules. 2.) What is the name of the process occurring in the diagram below and additionally, what is the name given to the condition/outcome/state created on the right side of the diagram below?arrow_forwardDescribe the two phenomena that give rise to the diversity of adhesion molecules such as cadherins. What additional phenomenon gives rise to the diversity of integrins?arrow_forward
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