Bacteria have a membrane potential, although the mechanisms of how it is maintained differ from those of mammalian cells. The transport of protons across the cell membrane is an important part of the mechanism, so a bacterium's membrane potential varies with the proton concentration-the pH-of the surrounding fluid. One strain of bacteria was found to have a membrane potential of -120 mV at a pH of 7.5. A bacterium can be modeled as a 1.5-um-diameter sphere Part A How many positive ions are needed on the exterior surface to establish this membrane potential? (There are an equal number of negative ions on the interior surface.) Assume that the membrane properties are the same as those of mammalian cells. ΣΕ ΑΣΦΑ N= ions Submit Request Answer

Bacteria have a membrane potential, although the mechanisms of how it is maintained differ from those of mammalian cells. The transport of protons across the cell membrane is an important part of the mechanism, so a bacterium's membrane potential varies with the proton concentration-the pH-of the surrounding fluid. One strain of bacteria was found to have a membrane potential of -120 mV at a pH of 7.5. A bacterium can be modeled as a 1.5-um-diameter sphere Part A How many positive ions are needed on the exterior surface to establish this membrane potential? (There are an equal number of negative ions on the interior surface.) Assume that the membrane properties are the same as those of mammalian cells. ΣΕ ΑΣΦΑ N= ions Submit Request Answer

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter5: Ground Rules Of Metabolism

Section: Chapter Questions

Problem 11SQ: Solutes tend to diffuse from a region where they are _______ concentrated to an adjacent region...

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During an investigation on membrane transport, a researcher exposed bacterial cells to different concentrations of two different solutes: A and B. The rate of transport of each solute into cells isrepresented in the graphSolute ASolute BSolute ConcentrationWhich of the following best explains the greater rate of transport for solute A than for solute B at higher solute concentrations?A Solute A is being transported by simple diffusion, which does not rely on membrane proteins to control the rate of transportSolute A is being transported by active transport, which uses ATP and has higher rates of transport than passive transportSolute A is being transported by facilitated diffusion, which uses membrane proteins to increase the rate of transportRate of Transport
1. Bacteria have a membrane potential, although the mechanisms of how it is maintained differ from those of mammalian cells. The transport of protons across the cell membrane is an important part of the mechanism, so a bacterium's membrane potential varies with the proton concentration the pH of the surrounding fluid. One strain of bacteria was found to have a membrane potential of -120 mV at a pH of 7.5. A bacterium can be modeled as a 1.5-µm- diameter sphere. How many positive ions are needed on the exterior surface to establish this membrane potential? (There are an equal number of negative ions on the interior surface.) Assume that the membrane properties are the same as those of mammalian cells.
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1:58 l 5GE Done 11 of 23 3 of 12 During an investigation on membrane transport, a researcher exposed bacterial cells to different concentrations of two different solutes: A and B. The rate of transport of each solute into cells is represented in the graph. = Solute A = Solute B Solute Concentration Which of the following best explains the greater rate of transport for solute A than for solute B at higher solute concentrations? Solute A is being transported by simple diffusion, which does not rely on membrane proteins to control the rate of transport. A Solute A is being transported by active transport, which uses ATP and has higher rates of transport than passive transport. B Solute A is being transported by facilitated diffusion, which uses membrane proteins to increase the rate of transport. Submit !! Rate of Transport II