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10 Cards in this Set
- Front
- Back
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Given D-ribose
Draw L-ribose... |
L- ribose
All -four -OH on the same side |
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Given D-ribose
Draw the ring structure alpha-D-ribose... |
Draw alpha -D - ribose......
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What's the difference between ribose and deoxyribose?
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Draw ribose and deoxyribose....
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What is the reaction intermediate for the mechanism of ribulose - 5 - phosphate?
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Draw the enediolate intermediate......
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Explain the term endergonic.
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+ delta G (Gibbs Free Energy)
- needs energy to proceed - Not spontaneous |
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Explain the term endothermic.
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+ delta H (Enthalpy)
- needs to take in energy from the surroundings to proceed - energy to break bonds of reactants is greater than the energy released from forming the products |
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What does Gibbs free energy tell us?
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Gibbs free energy tells whther a reaction is spontaneous.
+ delta G; non-spontaneous reaction - delta G; spontaneous reaction |
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What are the 3 key chemical features
to account for the free energy changes in ATP? |
1) the smaller solvation energy of ATP
2) electron delocalization betwn P-O-P 3) charge repulsion betwn O- charges |
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A) What is the nucleophile seen in the reaction catalyzed by hexokinase?
B) What features allow it to make Glu-6- phosphate and not hydrolyze ATP? |
A) Nucleophile = -OH on C-6 of glucose
B) 1 - Mg +2 stabilizes the charges of the O- groups. 2- H2O is removed from the active site in hexokinase by closure allowing the nucleophile to attack. |
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What is the enzyme that cleaves fructose-1,6 biphosphate? How many compds result?
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- aldolase
- 1 - 2 - 3 |
