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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b) If you soak an animal cell that is permeable to both water and glucose in either 5.5% glucose or 0.9% NaCl (both isosmotic solutions), the cell exposed to 5.5% glucose will gain water, while the cell exposed to 0.9% NaCl will not gain water. Predict why this is the case.
Which of the following statements is correct? 160 山L 140 KEY 120 Na+ 100 K* 80 CI 60 HCO, 40 Proteins 흐 20 Compartment A Compartment B Compartment B represents the cytosolic fluid Compartment A represents the blood plasma Compartment A represents the intracellular fluid Compartment B represents the extravascular water lon concentration (mmol/L)
A phospholipid bilayer separates two chambers. The chambers both contain the same volume of water. The left chamber contains 150 mM of an unknown solute A. Solute B is dissolved in the right chamber also at a concentration of 150 mM. Therefore, the initial osmolarity is the same (isotonic) between the two chambers. However, after a short time, the volume increases substantially in the right chamber. What is the most likely ranking of permeability for the molecules to cause this change? (greater permeability means that the molecule moves first across the membrane)
I don’t understand this
Lipid bilayers form spontaneously in a process driven by the hydrophobic effect. Explain how the hydrophobic effect drives bilayer formation from individual lipids in an aqueous environment. Describe how the physical properties of the lipid bilayer are determined by the chemical properties of the membrane lipid components. Diagrams are encouraged for both parts of the question.
A Removing water is to osmosis A Adding water is to osmolarity B. Gated channels are to mediated transport B Lipid bilayers are to net flux. C.A 600 mOsm cell is to a 200 mOsm solution. (all nonpenetraing) C 53 molar (H₂0) cell is to a 54 molar (H2O) solution (all nonpenetraing) D Transporters are to simple diffusion. D Voltage-gated channels are to secondary active i transport A Removing water is to concentration A Adding solute is to dilution B. Heat energy is to diffusion B Transporters are to downhill gradients. CA 350 mOsm solution is to an 300 mOsm cell (all) nonpenetraing) C 550 mOsm.cell is to a 550 mOsm solution (all nonpenetraing) D: Channels are to facilitated diffusion D Aquaporins are to membrane potentials A: Adding solute is to molarity as: B: ATP is to active transport as: C: Hypertonicity is to cell size as: D: Pumps are to active transport as: Reser
For biological membranes, which of the following statement is NOT true? A. The phospholipid bilayer is a fluid matrix. B. Protein can be anchored to the membrane by covalently linked lipid chains. C. Proteins can move laterally across the membrane. D. For organisms living in cold temperature, their cell membranes contain more triacylglycerols. E. Transverse motion of lipid molecules can occur occasionally. Enzyme lowers when... A. The energy difference between the substrate and the transition state B. The energy difference between the product and the transition state C. Both A and B D. Neither A nor B
Aquaporin channels allow the rapid passage of amino acids across the cell membrane. T or F
3) For each case given below, describe how the fluidity of membranes will change (increase or decrease) and why this change will happen. A. Increasing the number of double bonds (unsaturation) of the fatty acids in the phospholipids. B. Increasing the length of the fatty acid chains. C. Increasing the cholesterol content of the membrane D. Increasing temperature
The cell membrane has ion channels that can exist in two states, open or closed. When they are open, they let Na+ ions through. The energy of the open state is 4*10^-20 J. higher than the state of the closed channel. a. What proportion of the ion channels are open at a temperature of 20 C? b. How high should the temperature be so that 75% of the channels are open?
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
Assume that a beaker is divided in half by a membrane which is permeable to water only. A 0.45 M glucose solution is on one side of the membrane, and a 0.40 M NaCl solution is on the other side of the membrane. Indicate which direction would water move. Explain why the movement occurs in that direction.

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