Exam3 - Fall08 - BCH 3023 Fall 2008 Exam 3 Name 1 Identify...

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BCH 3023 – Fall 2008 Exam 3, 1/14/2008 Name: _________________________________ 1. Identify the following structures:   a.  Thymine, adenine, cytosine, and guanine b.  Cytosine, guanine,  thymine, and adenine c.  Cytosine, adenine, thymine, and guanine d.  Thymine, guanine, cytosine, and adenine e.   Adenine, guanine, uracil, and cytosine 2. The rate of movement (flux) of a substance X into cells was measured at different  concentrations of X, as plotted on the graph below.  Which of the following is true  about the movement of X. a. The movement of X is mediated by a protein transporter. b. The movement of X is not mediated by a protein transporter. c. X must be a charged species. d. X must be a phospholipid. e. G transport  is 0. 1
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BCH 3023 – Fall 2008 Exam 3, 1/14/2008 [X], mM Flux 3. In DNA sequencing by the Sanger (dideoxy) method: a. radioactive dideoxy ATP is included in each of the four reaction mixtures  before enzymatic synthesis of complementary strands. b. specific enzymes are used to cut newly synthesized DNA into small pieces,  which are then separated by electrophoresis. c. the dideoxynucleotides must be present at high levels to obtain long stretches  of DNA sequence. d. the role of dideoxy CTP is to occasionally terminate enzymatic synthesis of  DNA where G residues occur in the template strands. e. the template DNA strand is radioactive. 4. Which fatty acid has the lowest melting temperature? a. 26:1  12   b. 18:2  9,12   c. 18:1  9   d. 18:0 e. 16:0 5. Facilitated diffusion through a biological membrane is: 2
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BCH 3023 – Fall 2008 Exam 3, 1/14/2008 a. driven by a difference in solute concentration. b. driven by ATP. c. endergonic. d. genernally irreversible. e. not specific with respect to substrate.        6.  The primary difference between phosphoglycerides and sphingolipids involves: a.   the nature of the attached fatty acids b.   the nature of the attached alcohols c.   the presence/absence of phosphate d.   the substitution of sphingosine for glycerol and a fatty acid e.   phosphoglycerides and sphingolipids are two different names for the same
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This note was uploaded on 04/14/2010 for the course BHC 3023 taught by Professor Harmen during the Spring '10 term at University of South Florida.

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Exam3 - Fall08 - BCH 3023 Fall 2008 Exam 3 Name 1 Identify...

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