June 2012 Chemistry Regents #76-78

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51 Questions 52-55 Questions 56-59 Questions 60-62 Questions 63-65 Questions 66-68 Questions 69-71 Questions 72-75  Questions 76-78  Questions 79-81  Questions 82-85

 

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Base your answers to questions 76 through 78  on the information below.

The diagram below shows typical pH values found in four parts of the human digestive system. In the small intestine, the enzyme lipase acts as a catalyst, increasing the rate of fat digestion.

76 Which labeled part of the digestive system has the most acidic environment? [1]

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stomach   or

the one with a pH of 2

77 What is the color of thymol blue at the pH of the small intestine? [1]

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yellow

78 State how the catalyst lipase increases the rate of the fat digestion. [1]

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lowers the activation energy    or

provides and alternate pathway with less energy for the reaction to occur

on to Questions 79-81

 

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51 Questions 52-55 Questions 56-59 Questions 60-62 Questions 63-65 Questions 66-68 Questions 69-71 Questions 72-75  Questions 76-78  Questions 79-81  Questions 82-85

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