F08-practice-exam-3

F08-practice-exam-3 - Fall 2008 BCH 361 Principles of...

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Fall 2008 BCH 361 Principles of Biochemistry Practice exam 3 (1) State the first law of thermodynamics (1) (2a) Explain and name the different terms in this equation (4) (2b) A reaction has a H of -17.5 kJ/mol. Is this reaction endotherm or exotherm? (1) (3) The following parameters are given for a reaction: H = + 55 kJ/mol, S = 0.2 kJ/mol. a) Calculate G at 250K and 310 K. (2) b) Indicate if the reaction is endergonic or exergonic at the temperatures given above. (3) (4) Draw the D- and L- form of the glycerinealdehyde. (2) (5) What is the difference between an aldose and a ketose? Give one example of an aldose and a ketose? (3) (6) Are D- and L-Glucose enantiomeres or diastereomeres? (1) Page 1 17 points
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(7) Draw the reaction scheme for the formation of the Hemiacetal of ribose! (3) (8) Explain why the formation of the hemiacetal leads to a new stereocenter. Which of the two molecules is α -D-Glucose? (2) (9) What is a glycoside? Give one example for a glycoside! (3) (10) Name and draw the structure of one Disacharide! (3) (11) What is the major difference between amylopectin and cellulose? (1) (12) Formulate the sum equation for the conversion of Glucose to 2 molecules of Pyruvate (2) Page 2 14 points
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(13) Formulate the degradation of pyruvate to ethanol. Is there any phosphorylation of
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This note was uploaded on 09/30/2011 for the course BCH 361 taught by Professor Fromme during the Fall '08 term at ASU.

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F08-practice-exam-3 - Fall 2008 BCH 361 Principles of...

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