作者lorandy (D)
看板Grad-ProbAsk
标题[生医] [生化]-自由能
时间Tue Nov 10 20:34:21 2009
1. When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated
at 25℃ with phosphoglycerate mutase until equilibrium is reached, the
final mixture contains six times as much 2-phosphoglycerate as
3-phosphoglycerate. Which one of following statements is most nearly correct
? (R=8.315J/mol‧K;T=298K)
A) △G’0 is -1.44 kJ/mol
B) △G’0 is zero
C) △G’0 is +12.7 kJ/mol
D) △G’0 is incalculably large and positive
E) △G’0 cannot be calculated from the information given
2. All of the following contribute to the large, negative, free-energy change
upon hydrolysis of "high-energy" compounds except:
A) electrostaatic repulsion in the reactant
B) low activation energy of forward reaction
C) stabilization of products by extra resonance forms
D) stabilization of products by ionization
E) stabilization of products by solvation
以上两题答案为 1.A 2.B 不过我不知道为甚麽
有没有人可以稍微解释一下呢? 谢谢大家~~
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 114.36.144.148
※ 编辑: lorandy 来自: 114.36.144.148 (11/10 20:35)
※ 编辑: lorandy 来自: 114.36.144.148 (11/10 20:36)