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Biology (HSC Course) Topic 1: Maintaining a Balance Enzymes The Role of Enzymes Enzymes role is to maintain the rate of chemical activity in an organism. They are biological catalysts, increasing the rate of reaction in metabolic processes. They also enable reactions to occur at lower temperatures, which means that body temperatures do not have to be so high. Chemical Composition Enzymes are specialised large proteins, which are composed of chains of amino acids, which are …

…to maintain enantiostasis. PRAC: Structures in plants that assist in the conservation of water Stations set up around the room Pigface: thick, fat succulent leaves that reduce S.A exposure. Also able to store water in leaves in times of drought. Bottlebrush: woody fruits that do not require water and cannot lose water. Eucalyptus: leaves hang vertically to reduce exposure to the sun, thus reducing evaporation. Sunken stomates: reduces exposure for evaporation to be minimised