1. Draw the structure of the following triacylglycerols (TAGS) 1,2-dioleoyl-3-myristyl-sn-glycerol b. sn-16:0-12:0-16:0 а. c. LLnO
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- 1. What is the possible identity of the AA? a. Aspartic acid b. Lysine c. Alanine d. Proline 2. What is the isoelectric point of AA? 3. What is the pKa responding to the dissociation of the alpha-carboxylic group?Amylopectin has which of the following structural features? a. only α(1,4) glycosidic linkages b. only β(1,4) glycosidic linkages c. both α(1,4) and α(1,6) glycosidic linkages d. both α(1,4) and β(1,6) glycosidic linkages1. Which one is NOT a property of glycerol? a. "backbone" in the simple lipid structure b. undergoes condensation with three molecules of fatty acids c. its OH groups reacts with the fatty functional groups of fatty acids d. it is a water-soluble ester 2. Which one has to bends in the structure? a. palmitic acid b. oleic acid c. linoleic acid d. myristic acid
- 3. One of the triacylglycerols found in corn oil contains palmitic acid, linoleic acid, and linolenic acid. During the production of spreadable margarine, all of the double bonds in this triacylglycerol are converted from cis to trans isomers. Linoleic acid: CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOHLinolenic acid: CH3CH2CH=CHCH2CH=CHCH2CH=CH(CH2)7COOH Palmitic acid: CH3(CH2)14COOH a. Identify the unsaturated fatty acid(s) listed above and provide the associated omega designation. b. Draw an accurate representation of the structure of the triacylglycerol present in spreadable margarine. Circle all ester bonds in the structure you have drawn.1.A glucogenic amino acid is an amino acid that can be converted into glucose through glycogenesis. An example of glucogenic amino acid is _____________. * a.Histidine b.Lysine c.Leucine d.All of the given 2.The force between methylamine and acetate will be greater in methanol than in water because ___________. * a.Methanol has a lower dielectric constant than water b.Methanol, but not water, is structurally similar to methylamine c.Acetate and methylamine are more soluble in methanol than in water d.Dipole-dipole interactions between acetate and methylamine are induced in methanol, but not in water 3.Within the aqueous environment of an animal cell, sugars are stored as polymers rather than monomers. If the sugars were stored as monomers instead of polymers, which of the following properties would be least affected? * a.pH b.Viscosity c.Freezing point d.Osmotic pressure1. Which of the following is a structural component of a triacylglycerol? a. fatty acids b. glycerol c. both a and b d. neither a nor b 2. Which is TRUE regarding fatty acids? a. It contains a polar hydrocarbon chain. b. It is a component of oils and fats. c. both a and b d. neither a nor b 3. What happens in the stomach during lipid digestion? a. formation of micelles b. hydrolysis of lipids by salivary lipase c. both a and b d. neither a nor b 4. Which process does NOT happen in the small intestine during lipid digestion? a. secretion of bile salts b. formation of micelles c. absorption of long-chain fatty acids by the enterocytes d. a, b, and c are the correct answer. 5. Which of the following describes the enzymatic activity of pancreatic lipase? a. It hydrolyzes the bond between the fatty acids and glycerol. b. It emulsifies the lipid droplet into smaller globules. c. both a and b d. neither a nor b 6. What is the correct sequence of events during lipid digestion? I.…
- 7. The following compounds have high phosphoryl group-transfer potential except— phosphoenolpyruvate. phosphocreatine. glycerol-3-phosphate. adenosine triphosphate. 1,3-bisphosphoglycerate.1. a. Explain why the melting point of palmitic acid (16 carbons, no double bonds) is slightly lower thanthat of stearic acid (18 carbons, no double bonds). Explain why the melting point of oleic acid (18carbons, one double bond) is lower than that of stearic acid b. A mixture of lipids containing phosphatidic acid, cholesterol, testosterone, phosphatidylserine, andphosphatidylethanolamine was applied to a hydrophobic interaction chromatography column. Thecolumn was washed with a high salt buffer, and the lipids were then eluted with decreasing saltconcentrations. In what order would the lipids be eluted from the column? Explain your answer.A. A solution of amino acid having carboxylic side chain was titrated against NaOH. If the initial pH of the solution was 2.8. Describe the state of the functional groups of the amino acid at the initial pH and at 10.5 B. Briefly explain how you will separate amino acid mixture using the change difference between amino acids. C.A given glycine solution was titrated against NaOH and pH of the final solution was 4.8. Given that pKa1 and pKa2 of the glycine are 2.34 and 9.60 respectivel. Calculate the concentration of the dissociated amino acid in terms of the undissociated amino acid. If [x] and [y] are the concentration of dissociated and undissociated amino acid respectively.
- Which one of the following statements about the molecular structure of phosphatidylcholine is TRUE? a. It contains an isoprene chain. b. It contains a polar hydrophobic head group. c. It contains at least five alkene double bonds. d. It contains a phosphodiester bond. e. It contains a glycosidic linkage.A monosaccharide designated as an aldehyde sugar contains (a) a terminal carboxyl group (b) an internal carboxyl group (c) a terminal carbonyl group (d) an internal carbonyl group (e) a terminal carboxyl group and an internal carbonyl group_______ groups are the acid part of amino acids and fatty acids. a. Hydroxyl (OH) b. Carboxyl (COOH) c. Methyl (CH3) d. Phosphate (PO4)
