Lipid bilayers comprising high concentrations of gangliosides are very rare. Which of the followingexplanation is/are true?. Please note, there could be more than one answer.Gangliosides are not used as energy storage molecules.The hydrophobic tails on gangliosides form a conical shape rather than a cylindrical shape making closepacking difficult.□ Gangliosides contain large headgroups making close packing difficultGangliosides contain trans fatty acids resulting in a bent hydrophobic tail making close packing difficultGangliosides contain several sugar molecules that can only localize to the cytosol preventing bilayer formation

A lipid bilayer is a fundamental structural component of cell membranes in living organisms. It is…

Answered: Lipid bilayers comprising high…

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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Similar questions

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
Consider protein folding that results when the following components interact: Where the solution is at a pH of 7, green (thick-dotted line) represents aspartic acid (R group contains a carboxylic acid with pKa = 4), orange (thick-solid line) represents lysine (R group contains an amine with pKa = 10), and blue (thin-solid line) represents hydrophilic groups. Rank the three complexes in order from lowest to highest dissociation constants Kd (low Kd values correspond to good binding constants and low energy, while high Kd values correspond to low binding constants and high energy) as determined by intermolecular charge-charge interactions. For those complexes with charge-charge interactions being equal, look at the possibility for the formation of hydrogen bonds via carboxylic acid dimers (only possible when the carboxylic acid is protonated) which are low energy structures.
An amylose chain is 5000 glucose units long. At how many places must it be cleaved to reduce the average length to 2500 units? To 1000 units? To 200 units? What percentage of the glycosidic links are hydrolyzed in each case? (Even partial hydrolysis can drastically alter the physical properties of polysaccharides and thus affect their structural role in )
For each of the complex lipids below, choose (A) if the lipid concentration will increase or (B) if the lipid concentration will decrease when phosphatidic acid phosphatase is non-functional. ______ Triacylglycerol______ Phosphatidate______ Phospholipids made via CDP-DAG and a head group ______ Phospholipids made via DAG and an activated head group
What is the molecular weight of a linear polysaccharide consisting of 7 galactose monomers and 1 terminal glucose monomer? The molecular weight of glucose (C6H12O6) is 180.156 g/mol. Remember that the types glycosidic of linkages are irrelevant for calculating the molecular weight. Write your answer in terms g/mol.
The following is a block diagram for a glycerophospholipid where the building blocks are labeled with letters and the linkages between building blocks are labeled with numbers. ____________ 5. Which building blocks are glycerol residues? ____________ 6. Which building blocks are phosphate residues? ____________ 7. Which linkages involve an alcohol residue? ____________ 8. Which linkages involve both glycerol and fatty acid residues?
Match lipid descriptions in column A with the phospholipid types in column B. H is attached to the phosphate group bound to C3 of glycerol backbone An amino acid is attached to the phosphate group bound to C3 of glycerol backbone A primary ammonium ion is found in its structure A quaternary ammonium ion is found in its structure A. phosphatidylethanolamine B. glycerophospholipid C. phosphatidylcholine D. phosphatidylserine
Chondroitin sulfate chains have been likened to a large fishnet, allowing small molecules to pass through but excluding large ones. What structural features of chondroitin sulfate and proteoglycans in general are responsible for this phenomenon?
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. Complete the table by identifying the components that serve as the hydrophobic and hydrophilic units for each membrane lipid.
The following sattements are true for glycogen. EXCEPT: Branching of α(1→6) linkages every 8-12 residues Structure is branched but not as highly as amylopectin of starch Glycogen is stored energy for animals Like amylopectin, glycogen gives a red-violet color with iodine
Consider histidine as a free amino acid in aqueous solution. a) Draw the most likely structure of histidine under biochemical standard state conditions. Given that free histidine has the following three pKa values, assign each to its corresponding acidic hydrogen or conjugate base in the structure. pKa1 = 1.7; pKa2 = 6.2; and pKa3 = 9.1 b) For each pKa, give the corresponding expression for the equilibrium constant. It helps to write out the chemical equation for each. c) Create a speciation diagram for histidine by plotting Xi vs pH from pH = 4 to pH = 8 where Xi is the mole fraction of the two histidine species involved in the equilibrium constant in part b).
At pH 7, tryptophan crosses a lipid bilayer at about onethousandththe rate of indole, a closely related compound: Suggest an explanation for this observation.

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