6.4.P13
For all of the problems below put the letters corresponding to all the correct answers for each question. Note you will lose credit both for not including a correct answer AND for including an incorrect one.
A. Choose the answer or answers that correctly complete the following sentence. An O-P bond in ATP is referred to as a "high energy phosphate bond". Which of the following statements are true about that bond?
- The bond is a particularly stable bond.
- The bond is a relatively weak bond.
- Breaking the bond releases a significant quantity of energy.
- A relatively small quantity of energy is required to break the bond
B.The release of energy during the combustion of ethylene, C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) (exothermic) is due to:
- Breaking the C-C bond
- Breaking the C-H bonds
- Breaking the O-O bonds
- Forming the C-O and O-H bonds
C.The figure at the right shows the interaction potential between two molecules (along a particular orientation of the two molecules). The units of r are nm. Two possible states of the molecule are shown: one is labeled E1, the other E2. Which of the following statements are correct? - When the molecules are in the state E1, they are more stable than when they are in the state E2.
- When the molecules are in the state E2, they are more stable than when they are in the state E1.
- When the molecules are separated by a distance of 5 nm, the force between them is attractive.
- When the molecules are separated by a distance of 2 nm, the force between them is attractive.
- When the molecules are separated by a distance of 7 nm, the force between them is attractive.
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Joe Redish 8/16/12
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