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15 Cards in this Set
- Front
- Back
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Enzymes are:
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proteins that act as biological catalysts.
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Enzymes operate in:
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an optimum range of pH and temperature, extreme heat or pH can denature (unravel) the protein and render it functionless.
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Catalase is:
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a liver enzyme that breaks down hydrogen peroxide into oxygen and water.
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What was the effect of temperature on catalase activity:
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denaturation. Temperature increases an enzymes rate of catalyzed reaction but only up to a point. If the heat goes beyond the optimum temperature then the enzyme denaturizes (breaks down)enzymes.
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What was the effect of pH on catalase activity:
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Enzymes have an optimum pH of 6 to 8 above or below this range and the enzyme will prevent the enzymatic reaction
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Enzymes function is:
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to lower the activation energy required for a chemical reaction to take place. This increases the rate of the chemical reaction. All chemical reactions in a cell is catalyzed by a certain enzyme.
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Catalyst:
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A substance that increases the rate that a chemical reaction takes place but the catalyst is not consumed during the chemical reaction.
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Catalse:
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Enzyme found in liver cells and it's function is to break down hydrogen peroxide into water and oxygen.
2H2O2+catalse=2H2O+O2 |
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What property of hydrogen peroxide makes it harmful to cells?
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It is a toxic oxidative agent that is a by-product of cellular metabolic activities.
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Cold temperatures:
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slow down an enzymatic reaction.
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Enzymes have a high turnover rate:
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many reactions take place before dying.
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Enzyme 3-D shape:
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Determines it's functionality.
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Active site:
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3-D pocket that fits a specific substrate (lock & key fit).
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Chopped liver:
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produced less gas than whole liver.
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Bandura, Albert
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"Modeling" - observational learning - Attention, Retention, Reproduction, Motivation
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