Of the following cell membrane lipids, which one prefers to reside in the INNER leaflet (or inner half) of the membrane bilayer, AND is zwitterionic at physiological pH (7.4)? PS (phosphatidylserine) is inner-leaflet & zwitterionic PC (phosphatidylcholine) is inner-leaflet & zwitterionic 3 of these 4 responses are correct SM (sphingomyelin) is inner-leaflet & zwitterionic PE (phosphatidylethanolamine) is inner-leaflet & zwitterionic

Of the following cell membrane lipids, which one prefers to reside in the INNER leaflet (or inner half) of the membrane bilayer, AND is zwitterionic at physiological pH (7.4)? PS (phosphatidylserine) is inner-leaflet & zwitterionic PC (phosphatidylcholine) is inner-leaflet & zwitterionic 3 of these 4 responses are correct SM (sphingomyelin) is inner-leaflet & zwitterionic PE (phosphatidylethanolamine) is inner-leaflet & zwitterionic

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 5RE: Using the answer code on the right, indicate which membrane component is responsible for the...

See similar textbooks

Similar questions

Of the following cell membrane lipids, which one prefers to reside in the inner leaflet (or inner half) of the membrane bilayer, AND has an overall neutral charge at physiological pH (7.4)? a) PE (phosphatidylethanolamine) is inner-leaflet with an overall neutral charge at pH 7.4 b) SM (sphinogomyelin) is inner-leaflet with an overall neutral charge at pH 7.4 c) PS (phosephatidylserine) is inner-leaflet with an overall neutral charge at pH 7.4 d) PC (phosphatidylcholine) is inner-leaflet with an overall neutral charge at pH 7.4
Of the following cell membrane lipids, which one 1) prefers to reside in the inner leaflet (or inner half) of the membrane bilayer, AND 2) is not zwitterionic at physiological pH (7.4)? 1. SM (sphingomyelin) is inner-leaflet & NOT zwitterionic 2. PC (phosphatidylcholine) is inner-leaflet & NOT zwitterionic 3. PS (phosphatidylserine) is inner-leaflet & NOT zwitterionic 4. 2 of these 3 responses are correct
A phospholipid bilayer with equal amounts of saturated and unsaturated fatty acids displays a specific permeability to glucose. What effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose?
A common structural feature of membrane lipids is their amphipathic nature. For example, in phosphatidylcholine, the two fatty acid chains are hydrophobic and the phosphocholine head group is hydrophilic. For each of the following membrane lipids, name the components that are hydrophilic and hydrophobic.. a)phosphatidylethanolamine b) sphingomyelin c) galactosylcerebroside d) ganglioside e) cholesterol
In 2-3 sentences, summarize the spatial distribution of different types of structural lipids within cells. Of the types discussed in class, which are predominantly found on the outer leaflet of the plasma membrane, and which are more likely to be found on the interior of the cell? In your explanation, suggest a reason for this distribution.
There is a relatively high concentration of phosphatidylcholine on the lumenal side of the ER membrane. What feature of membranes is responsible for this effect?
The equilibrium potential for a given ion (Eion) is a theoretical value. For a given concentration gradient of an ion, the equilibrium potential is the charge inside the cell required to hold an ion at that concentration. That is, it is the charge required to perfectly oppose the drive of the ion to move down its concentration gradient. So, if the concentration of Nat is higher outside the cell than inside, its equilibrium potential (ENa) must be I and if we add more sodium to the extracellular fluid, then ENa will II.
Which of the following lipid components of the eukaryotic plasma membrane would be associated with the highest membrane fluidity? a triglyceride with unbranched, saturated, short-chain fatty acids a monoglyceride with unbranched, saturated, short-chain fatty acids a triglyceride with unbranched, saturated, long-chain fatty acids a monoglyceride with branched, unsaturated, short-chain fatty acids a diglyceride with unbranched, saturated, long-chain fatty acids
Phospholipids (Which is charged, what is the functional significance? Are they preferentially located on cytosolic or extracellular lipid monolayer? What is the functional significance of plasma membrane asymmetry?)
Uncharged molecules can passively pass through membranes more readily than charged molecules. Acetylsalicylic acid, better known as aspirin, has a single carboxylate group with a pKa of 3.5. Approximately what percentage of the molecule is charged in the stomach, and approximately what percentage is charged at normal blood pH at the surface of a blood vessel? Finally, per unit surface area, where would the rate of passive transfer across a membrane be highest? A.) 1%, >99%, stomach B.) >99%, 1%, stomach C.) 1%, >99%, blood vessel D.) 50%, 50%, blood vessel E.)>99%, 1%, blood vessel F.) 50%, 50%, stomach
Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a NaCl concentration of 0.50M on the "right side" and 0.08 M on the "left side", given the following conditions. In each case, state which side is (+) and which is (−). Membrane permeable only to Cl−.
Estimate the flux (mg/cm2/s) by diffusion of estrogen (a steroid) through a lipid bilayer cell membrane when assuming the diffusion coefficient for estrogen across the lipid bilayer is 10^–6 cm2/s, and that the initial concentration of estrogen in the extracellular fluid is 1 ng/mL and 0 in the cytoplasm.