The diagrams illustrate that the membrane selects according to theInitialTwo hours laterglucoseNa Na+proteinstarchstarchSelect one:H₂OglucoseproteinSelectivelyPermeableMembraneH₂Oa. size of the molecules.b. electronic charge of the molecules.c. temperature of the solution.d. concentration of the molecules.CrglucoseNaproteinstarchstarchproteinH₂OSelectivelyPermeableMembranecrH₂Oglucose

All the cells prokaryotic as well as eukaryotic are enclosed by a cell membrane. Selectively…

Answered: The diagrams illustrate that the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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20. Active transport of a substanceacross a membrane requires A A gradientB the expenditure of ATPCwaterD diffusion
Some cells lining tubules in the kidneymaintain normal cell volume bysynthesizing organic solutes. Where inthe kidney would you expect to findthese cells? Explain.
Concerning the process of diffusion, at equilibriuma. the net movement of solutes stops.b. random molecular motion continues.c. there is an equal movement of solute in opposite directions.d. the concentration of solute is equal throughout the solution.e. All of these are correct
Describe primary and secondary active transport across a membrane, includingdetails of the major differences between these mechanisms.
The determination of membrane permeability to a specific solute is broadly Fick's first law that is modified to account fo.. all of the aboe O membrane thickness O the solute's ability to dissolve in lipids O the electrical interaction between the solute and the membrane O the size of the solute relative to the membrane lipids
B) Rate of transport into the cll A or B 10 20 30 40 Time (min) The graph directly above shows the rate of substance transport over time when the cells that do not contain the compounds A, B, or C, are placed in 1 mM solutions of A, B, and C, respectively. Based upon these data which of the following is/are compatible modes of transport for substance A? (active transport, facilitated diffusion, simple diffusion) For substance B? For substance C?
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
Match the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicleB. movement down the concentration gradient with a carrier protein, without energy inputC. movement down the concentration gradient without a carrier protein or energy inputD. a particle or substance leaves a cell in a vesicle that merges with the cell membraneE. movement against the concentration gradient with energy inputF. hydrostatic pressure forces substances through membranes
8. Define homeostasis. maintoining nterral balance 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?
Given a selectively permeable membrane that is permeableto water but not to a particular solute and given that thereare different solute concentrations on the two sides of themembrane, show the direction of water movement and labelthe side with the higher osmotic pressure.
Active transport involves Select one: O a. Production of adenosine triphosphate (ATP) O b. Transport of solute down a concentration gradient O c. Osmosis O d. Pumping solutes across the membrane O e. Diffusion of solute through the lipid bilayer of a membrane
Aquaporins are transmembrane proteins thatpromotea. pinocytosis.b. carrier-mediated transport.c. active transport.d. facilitated diffusion.e. osmosis

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