6K-108 - Net ID KEY A Quiz 6a 1 Below ATP is abbreviated to...

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Net ID KEY A Quiz 6a 10/29/08 1. Below, ATP is abbreviated to show only the triphosphate explicitly. Write the hydrolysis rxn , drawing the products in the same level of detail as the A-P-P-P shown. Then list 4 reasons why ATP hydrolysis is so favorable. Reasons hydrolysis is favorable: i. Pi resonance ii. decreased electrostatic repulsion iii. better product solvation iv. favorable H+ release 2. (4 pts) Match the molecule on the left with the description on the right. Write the letter in the blank. Use each letter A-D only once. a. _ B _ di(C18:0)-phosphatidylcholine A. lipid with a tiny polar headgroup b. _ C _ di(C18:2)-phosphatidylcholine B. lipid likely to form a solid-phase bilayer c. _ A _ cholesterol C. lipid likely to form a fluid-phase bilayer d. _ D _ triacyl(C18:1)glycerol D. lipid that forms a fluid fat droplet 3. (8 pts) Calculate G for the overall rxn shown below. Circle your answer! Show calculations! R = 0.0083kJ/mol . K and T = 300K. for ATP ADP + Pi , G o' = -30kJ/mol and for glucose + Pi glucose-P , G o' = +14kJ/mol ATP + glucose ADP + glucose-P where [ATP] = 9mM, [ADP] = 3mM, [glucose] = 4mM, and [glucose-P] = 5mM G = -16kJ/mol + (0.0083kJ/mol . K)(300K)ln(3 x 5)/(9 x 4) = -16kJ/mol + (2.49kJ/mol)ln(0.42)
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6K-108 - Net ID KEY A Quiz 6a 1 Below ATP is abbreviated to...

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