of the following membrane lipids does not contain a fatty acid tail? B) A glycol
ID: 93522 • Letter: O
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of the following membrane lipids does not contain a fatty acid tail? B) A glycolipid c) Phosphatidylserine E)Cholesterol ug bacterium is suddenly expelled from a warm buman intestine into the cold world outside, which of the following adjustments might bacterium make to maintain the same level of membrane fluidityn A) Increase the length of the hydrocarbon tails in its membrane phospholipids. B) Increase the proportion of hydrocarbon tails in its membrane phospholipids Increase the proportion of hydrocarbon tails with no double bonds in its membrane phospholipids. D) Decrease the amount of cholesterol in the membrane. E Decrease the amount of glycolipids in the membrane. 40. Why are glycolipids found on the extracellular, but not the cytoplasmic, surface of the plasma membrane? transport them from the cytosolic face, B) The enzymes that produce them are present only on the surface of the plasma membrane. Golgi cy The enzymes that add the sugar groups are confined to the inside of the endoplasmic reticulum and the D) The oligosaccharides on glycolipids are cleaved off by enzymes found only in the cytosol. EThey flip spontaneously, after incorporation, due to the hydrophilic sugar head groups. 41. Where does most new membrane synthesis take place in a eucaryotic oell? B) In the endoplasmic reticulum A) In the Golgi apparatus the mitochondria C) in the plasma membrane E)On ribosomes 42. Three phospholipids X, Y, and Zare distributed in the plasma membrane as indicated in the figure below. For which of these phospholipids does a probably exist? E) X and Z D) Y and Z A) only B) Z only C) X and Y 43. You perform single particle tracking (SP) experiments on three proteins, A, B, and C, and obtain the following pathways hich protein displays a pattern of motion similar to a protein that is anchored to the cytoskeleton? A) A B) B In paramecium, cell surface integral membrane proteins are synthesized A) in the cytoplasm by free ribosomes. B) by ribosomes in the nucleus. by ribosomes bound to the rough endoplasmic reticulum. D) by ribosomes in the Golgi vesiclesExplanation / Answer
Q 38 ) option E ( Cholesterol)----cholesterol is a steroid. it is a ring-like structure,so it doesn't contain fatty acid tail.Cholesterol is a lipid with a structure quite different from that of phospholipids
Q 39 ) option A(true) as this happen the bacterium Produce lipids with hydrocarbon tails that are shorter and have more double bonds.
Q40) option C The enzymes that add the sugar groups are confined to the inside of the endoplasmic reticulum and the Golgi apparatus.
Q 41 )option B(in the endoplasmic reticulum)Endoplasmic reticulum is the place where new membrane synthesis take place in eukaryotic cell
Q 42 ) option C ( X&Y is the correct answer because, when phospholipids are put into the cytosolic face of lipid bi-layer, flippases are required to move X&Y to the opposite faces of the lipid bilayer, as they can't voluntarily flip across the bilayer)
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