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- 1. Draw the structure of a cholesterol ester where cholesterol is esterified with palmitic acid. is this polar or nonpolar acid 2. Draw the strucutre of lecithin containing stearic acid on carbon 1 and arachidonic acid on carbon 2 of glycerol. is this polar or nonpolar acid 3.Disccuss the medical sginificance of cholesterol , cholesterol ester,l ecithin and choline . 4. Give examples of phosphoglycerides and sphingolipids of biological importance .8. For protein adsorption to the types of material surfaces designated below, indicate whether the adsorption process is primarily mediated by either enthalpic or entropic effects. Briefly justify your answers for each case. (A) A material surface functionalized with nonpolar groups (i.e., hydrophobic). (B) A material surface functionalized with polar groups (i.e., neutral hydrophilic). (C) A material surface functionalized with charged groups (i.e., +/-).You have a mixture of 4 amino acids (Q, W, E, R, T) that you want to separate using ion exchange chromatography. Which of these amino acids would bind most strongly to a DEAE anion exchange column at pH 7? Q W E R T
- 7. Draw and give the full names of the amino acids in the following dipeptides. ČHS HN- OH CH, CH- OH CH24. Observe the following diagram carefully and answer the following questions. (a) Identify the "B" subunit. Explain its role as a biomolecule. (b) What component does the diagram represent? Briefly mention its function. A NH2 OH в Your answerIn relation to the peptide sequence that is presented. -Gly - Ser – Cys – Asp – Glu – Arg – Cys – Arg- ................ S_____________________S The correct option is A. Contains more negative than positive residues B. Contains only one charged alpha-aa C. The formation of the disulfide bridge is incorrect D. Hydrophilic and charged residues predominate
- In sickle cell anemia, hemoglobin forms long fibers as a result of Burying of non-polar amino acids Electrostatic interaction between glutamate and non polar amino acids Exposing polar amino acids Burying polar amino acids. The following diagram shows the biosynthesis of B12 coenzymes, starting with the vitamin. DMB is dimethylbenzimidazole. (a) What one additional substrate or cofactor is required by enzyme B? (b) Genetic deficiency in animals of enzyme C would result in exces- sive urinary excretion of what compound?2. (a) The diagram below shows the structure of a lipid. i. Which type of lipid does this structure belong to? ii. Give one example of molecule made up of this type of lipid. iii. Describe the distinct roles of this type of lipid on membrane at different temperatures. Keep your answer brief. (b) The figure illustrates the structure of a lipid. CH2-O- CH-O- CH2 i. Regarding the types of fatty acids, what is the name of this type of lipid? Give the full name, not abbreviation. ii. After hydrolysis, the fatty acid chain indicated by an arrow is released. Name this fatty acid in n-system and delta (A) designation. ii. How can the fatty acid release energy in the cells?
- 1. What percent of the total body water is contained within the interstitial fluid? Round your answer to nearest whole number, do not report a decimal (35 not 35.0), do not put the % symbol after the number 2. Identify the analogous protein molecule to a carbohydrate monosaccharide. 3. Identify a chemical reaction type that is both anabolic and endergonic.8. A dipeptide T, obtained from the breakdown of an enzyme found in the human body, is made up of Amino Acids R and S. (a) Classify Amino Acids R and S as an acidic amino acid or a basic amino acid. (b) Name Bond Q. (c) State any ONE type of protein that could be found in human body. (2%) (1%) (1%)1. Theoretically, a protein could assume a virtually infinite number of configurations and conformations. Suggestseveral features of proteins that drastically limit the actual number. 2. What are the greatest structural features that differentiate sphingolipids from phosphoglycerides? 3. High levels of glucose-6-phosphate inhibit glycolysis. If the concentration of glucose-6-phosphate decreases,activity is restored. Why?
