CH369 exam2s03 - Multiple Choice 1. The vitamin biotin is...

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Multiple Choice 1. The vitamin biotin is involved in this type of reaction: a. Carboxylation reactions b. Decarboxylation reactions c. Redox reactions d. Acyl transfer reactions e. Transamination reactions 2. Glycolipids are characterized by containing the following non-lipid component: a. Sugars b. Glycerol c. Phosphate d. Sphingosine e. More than one of these characterize glycolipids. 3. The mechanism of membrane transport may involve the following: a. ATP hydrolysis b. Conformation change of membrane proteins c. Phosphorylation or dephosphorylation of membrane proteins d. ATP hydrolysis and conformation change of membrane proteins e. All of these are correct 4. The following lipid vitamin is important in blood clotting: a. A b. D c. E d. K e. More than one is essential for blood clotting 5. The sugar called maltose contains the following simple sugars: a. Galactose b. Glucose c. Fructose d. Both Galactose and Glucose e. Both Glucose and Fructose 6. A bacterial cell wall is composed of: a. One type of polysaccharide and 2 different types of oligopeptides, which are cross-linked b. One type of polysaccharide and 1 type of oligopeptide, arranged in 2 different directions c. One type of polysaccharide and an oligopeptide covalently bonded to the cell membrane d. More than one of these statements is true
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7. In a plot of 1/V against 1/[S] for an enzyme-catalyzed reaction that obeys Michaelis-Menten kinetics, the presence of a competitive inhibitor will alter the: a. V max b. intercept on the 1/V axis c. intercept on the 1/[S] axis d. curvature of the plot e. pK of the plot 8. Enzyme X exhibits maximum activity at pH 6.9. X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4. One likely interpretation of this pH activity is that: a. the reaction relies on specific acid-base catalysis b. a His residue on the enzyme is involved in the reaction c. a Glu residue on the enzyme is involved in the reaction d. the enzyme is found in gastric secretions e. the enzyme has a metallic cofactor 9. A small molecule that decreases the activity of an enzyme by binding to a site other than the catalytic site is termed a(n): a alternative inhibitor b. allosteric inhibitor c. stereospecific agent d. competitive inhibitor e. transition-state analog 10. A metabolic pathway proceeds according to the scheme, R
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This note was uploaded on 03/30/2010 for the course CH 369 taught by Professor Kbrowning during the Spring '07 term at University of Texas at Austin.

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CH369 exam2s03 - Multiple Choice 1. The vitamin biotin is...

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