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- Among the glycerophospholipids containing palmitic acid and linoleic acid which will have the greatest solubility of water: phosphatidlycholine, phosphatidylethanolamine or phosphatidylserineWhich of these compounds is most soluble in water at pH 7.0? (Note that the non- ionized forms are shown, and remember that ionization will impact solubility!) ( CH3-CH2-CH2-CH2-NH2 CH3-CH₂-CH₂-CH₂-CH3 O CH3-CH2-CH2-CH2-CHO OCH3-CH₂-HCO-O-CH3 (an ester)1. Draw the condensed structural formulas for A and B. [0] [0] CH, CH, CH-CH, C-OH А B 2. Identify the type of glycosidic bond that links the monosaccharides and the structure of the disaccharide as a- or 8-isomer. CH-OH H. H OH H. CH, HO OH H. H. ОН Н OH HO H. OH A,
- (i) Identify the type of sphingolipids A and B in Figure 2. CHS A CH3 в Figure 2 (ii) What structural similarities are shared by sphingolipids and proteins? (iii) Why are sphingolipids abundant in cell membrane?Which noncovalent interactions (discussed in Section 8.2) are responsible for the cohesion of lipid molecules? Is the overall strength of these forces weak or strong? Why are lipids incompatible with water?If crystals of deoxy Hb are exposed to air, they break. What does this imply about the 4o structure of deoxy Hb and oxy Hb and predict which subunits junctions are most affected in the change from deoxyHb to oxyHb?
- Match the following Class of Proteins with their corresponding Prosthetic Group Components. nucleic acids 1. hemoproteins metal ion 2. lipoproteins phosphate group 3. flavoproteins pigment 4. glycoproteins heme unit 5. phosphoproteins 6. nucleoproteins lipid 5. metalloproteins flavin nucleotides -8 chromoprotein carbohydrateLipoprotein particles (Figure 3.18) are spherical clusters of protein and lipid molecules that circulate in the blood of animals and are rather substantial in size (see Figure 3.11). They function similarly to suitcases, transporting cholesterol, fatty acid residues, triglycerides, and phospholipids from one location in the body to another throughout the body. In light of your knowledge of lipid insolubility in water, which of the four types of lipids would you expect to be on the exterior of a lipoprotein clump that is bathed in the water-based fluid part of blood?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 serve as the hydrophobic and hydrophilic units: (a) phosphatidylethanolamine; (b) sphingomyelin; (c) galactosylcerebroside; (d) ganglioside; (e) cholesterol.
- Q38 (1.5): In the diagram, what does the plane draw behind the peptide bond indicate? Ca N H H RPhosphatidylinositol is formed using phospholipid synthesis strategy #1. Given this information, which of the following statements is true? (A) CTP reacts with diacylglycerol.(B) Synthesis of phosphatidylinositol requires functional lipin enzyme.(C) Synthesis of phosphatidylinositol requires that the alcohol head group is activated. (D) CDP-inositol reacts with diacylglycerol.(E) CDP-diacylglycerol reacts with inositol.At pH 7, tryptophan crosses a lipid bilayer at about onethousandththe rate of indole, a closely related compound: Suggest an explanation for this observation.