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A-Level Biology OCR A

Structural Catalase Heam Hydrogen Peroxide Breakdown Identify Key

Catalase is an enzyme with a quaternary structure containing four iron-containing heme groups, catalyzing the breakdown of hydrogen peroxide to eliminate a toxic substance for cells.

La catalasa es una enzima con estructura cuaternaria que contiene cuatro grupos hemo con hierro, que cataliza la descomposición del peróxido de hidrógeno, eliminando una sustancia tóxica para las células.

Front Identify key structural components, properties and functions of an enzyme.
Back Catalase

Structural components:
  • Quaternary structure
  • Contains four prosthetic heam groups
  • Fe2+ present in each heam group

Properties:
  • Iron ion allows catalase to interact with hydrogen peroxide and speed up its breakdown

Function:
  • Catalyst for breakdown of hydrogen peroxide
  • Gets rid of it bc buildup can be toxic to  cells and cell components

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