Regents Prep: Living Environment
Multiple-Choice Questions
  Question 1 of 13   Biochemical Processes
Hydrogen peroxide (H2O2) is a toxic by-product of cellular metabolism in aerobic organisms. The reaction below occurs within the cells to prevent the accumulation of hydrogen peroxide. In this reaction, catalase functions as an


 1.  enzyme in the breakdown of hydrogen peroxide

 2.  enzyme in the synthesis of hydrogen peroxide

 3.  emulsifier in the digestion of hydrogen peroxide

 4.  indicator in the detection of hydrogen peroxide

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