halmi h Extra credit Reading ass × l/execute/content/file?cmd-view&content; id-7
ID: 203105 • Letter: H
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halmi h Extra credit Reading ass × l/execute/content/file?cmd-view&content; id-7839710 18course id- 290517.1 1. All of the following are examples of competitive inhibitors EXCEPT a insecticides. b. lead c. penicillirn d. ibuprofen. 2. To say that an enzyme has been denatured means that a. an inhibitor has bound the enzyme at the active site. b, the enzyme is working at its maximal rate. c. the enzyme is working at an optimal temperature d. its three-dimensional structure has changed and the enzyme can no longer function properly 3. At which pH level to most enzymes work best in human cells? a. 5.3 b. 7.4 c. 10.5 d. 13.7 The optimum reaction rate of a particular enzyme occurs at pH 7.3 at 37°C. This reaction would probably proceed faster by 4. a. decreasing the pH and increasing the temperature. b. increasing the temperature to 38 C and keeping the pH at 7.3. c. increasing the pH and maintaining the temperature at 37°C. d. increasing both temperature and pH. 5. Preservatives such as citric acid are added to foods to interfere with bacterial growth This creates an acidic pH in the food. Why does this affect the bacteria that are present? n acidic environment encourages endergonic reactions in the bacterial cells. a. A b. ic environment increases the activation energy more quickly in bacteria. c. An acidic environment causes bacterial enzymes to fail or work less efficientlyExplanation / Answer
1. Answer is option (A) lead is a non competative inhibitor.
2. Answer is option (D) Its three dimensional structure has change and enzyme can no longer function properly.
3.Answer is option (B) 7.4.
4. Answer is option (B) increasing the temperature at 38 °C and keeping the pH 7.3.
5. Answer is option (C) an acidic environment causes bacterial enzymes to fell are work less efficiently.
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