1-6 1. A given reaction has a (AG of 413 kJ/mol. Based on this information which
ID: 713916 • Letter: 1
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1-6
1. A given reaction has a (AG of 413 kJ/mol. Based on this information which of the following statements must be true? a) The reaction is thermodynamically favored (spontaneous b) The reaction is exergonic c) The activation energy (Ea) for the reaction is small d) The equilibrium constant for the reaction is greater than 1 e) The equilibrium constant for the reaction is less than l 2. Which of the following correctly lists the relative strengths of the non-covalent interactions in biochemistry? (from strongest to weakest) a) hydrophobic effects ~ electrostatics > Van der Waals > hydrogen bonding b) hydrogen bonding ~ electrostatics> Van der Waals> hydrophobic effects c) hydrogen bonding - electrostatics> Van der Waals> hydrophobic effects d) hydrogen bonding-Van der Waals electrostatics> hydrophobic effects e) Van der Waals-electrostatics > hydrogen bonding>hydrophobic effects 3.involves the sum of the breakdown and building up of biological macromolecules a) metabolism b) catabolism c) anabolism d) transition state stabilization e) none of the above are a class of biological macromolecules that contain many non-polar 4. (aliphatic) groups and contain amino acid monomers a) proteins, lipids b) lipids, proteins c) carbohydrates, proteins d) nucleic acids, lipids e) proteins, nucleic acids 6. The following molecule is an example of a (n) a) aldehyde b) sulfide c) ketone d) thiol e) alkyl halideExplanation / Answer
1. e) the equilibrium constant for the reaction is less than 1
The relationship is given as DG = -RT lnK where K is the equilibrium constant. The value will be positive only if lnK is negative which implies K should be less than 1.
2. d) hydrogen bonding~ van der waals > electrostatics> hydrophobic effects
3. Metabolism involves the sum of the breakdown and building up of biological macromolecules.
4. Lipids are a class of biological macromolecules that contain many non- polar groups and proteins contain amino acid monomers.
5. c) ketone
It has a C double bond O group.
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