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

Which of the following is not a lipid link that anchors membrane-associated proteins to the bilayer?     Thioether-linked prenyl anchors.     Ester-linked triacylglycerol anchors.     Glycosyl phosphatidylinositol anchors.     Thioester-linked fatty acyl anchors.     Amide-linked myristoyl anchors.

The cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.

Which of these general statements is TRUE about the lipid called phosphatidylethanolamine (or PE)? PE is NOT an aminophospholipid. 3 of these 4 responses are correct PE resides mainly in the outer leaflet of the membrane bilayer. PE is zwitterionic at normal cell pH. PE is a type of cholesterol.

Diffusion and Osmosis What is your prediction about the effect of molecular weight on rate of diffusion? What is your prediction about the effect of temperature on rate of diffusion?

what would the membrane potential be if the membrane became 10X more permeable to both sodium and chloride

Where is the KV1.1 (a membrane protein) polypeptide synthesized in the cell?  (word bank: cytoplasm, nucleus, rough ER, smooth ER, mitochondria)    The amino acids that line the outside of the KV1.1 protein (i.e., those in contact with the phospholipid bilayer's fatty acids tails) are more likely to be _______(word bank: hydrophobic, hydrophilic) The KV1.1 protein utilizes __ transport to move the K+ ions across the membrane.  (word bank: active, passive) This disease can be caused by missense mutations.  In general, how specifically would a missense mutation affect the KV1.1 protein?

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.

Please answer both, thank you

The sarcoplasmic reticulum Ca2+-ATPase, pumps 2 mol Ca2+ out of sarcomeres per mol ATP hydrolyzed. Given the following steady-state concentrations and a membrane potential of 67 mV (inside negative), calculate ΔG for the following active transport process at 37 ∘C and pH=7.4:2Ca2+(in)+ATP+H2O→2Ca2+(out)+ADP+Pi+H+