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Which of the following substituents are listed in correct order of priority from highest to lowest (line indicates bond to alkyl C)?
A. I–, H–, Cl–, Br–
B. H–, CH3 –, CH3-CH2–, Br–
C. Br–, I–, F–, OH–
D. Br–,CH3-CH2–, CH3 –, H–
E. H–, OH–, CH3–, Br–
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- Which of the following compounds would be most soluble in carbon tetrachloride, CCl4? a. NH3 d. CH3OHb. H2O e. C6H6c. HClWhich of the following linkages is found in sphingolipids? a. sphingosine-choline-phosphate b. sphingosine-phosphate-choline c. phosphate-sphingosine-choline d. none of the aboveIn the Equation: HCO3- + HCl --------> Conjugate Acid + Conjugate Base a ) Which reactant is the Acid? b) Which reactant is the Base? c) What Conjugate Acid will form in this reaction? d) What Conjugate Base will form in this reaction?
- 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 linkagesWhich of the following statements about this structure is TRUE? a. It contains a phosphoester bond b. It contains a pentose sugar. c. It is a deoxynucleoside triphosphate. d. Both a. and b. e. Both a. and c.B-pt and M-pt of various organic compounds depends on intermolecular forces of attraction which depend on following (a) Inter molecular/intramolecular H-bond. (b) Dipole-Dipole interaction (Carboxyl and ether). (c) Molecular size (d) Surface area. (branching).
- 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.What coefficient must be placed in the following blanks so that all atoms are accounted for in the products? C6H12O6 ------->___________C2H6O +_____________CO2 a. 1;2 b. 3;1 c. 1;3 d. 2;2What is the point group of the following molecule? A)D3h B)C5v C)C1 D)D2h E)C2h
- Which of the following statements regarding the nitrogenous base guanine is FALSE? A) ALL of these statements are TRUE B) the enol form of guanine base-pairs with thymine C) guanine undergoes a tautomeric shift between a keto and an enol form D) the keto form of guanine base-pairs with cytosine E) an alcohol (-OH) group is present in guanine's enol form, but absent in the keto form F) guanine’s keto form is more stable than its enol form1. which IR stretches and bends indicate what type of functional group we have (alcohol, carboxylic acid, ester), 2. how you can then use IR to monitor the change from the starting materials to the products. 3. indicate and discussion the absorptions that are relevant to alcohol OH and C-O, carboxylic acid OH, carboxylic acid C=O, ester C=O, and C-O). the picture below is an ir spectra of ethanolWhich of the following statements about monosaccharides is true? A. Monosaccharides are classified according to the location of their carbonyl group. B. The penultimate chiral center of a monosaccharide determines its handedness. C. If the carbonyl group of a monosaccharide is terminal then it will react positively with Barfoed's and Seliwanoff's tests. D. The cyclization of monosaccharides results to the formation of a cyclic ether. E. The existence of anomers is due to the mutarotation along the reference carbon
