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Biology Discussion Notes Thursday 10/30/2014
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Goals for the Day 1.Be able to determine the reactants and products of a chemical equation. 2.Be able to define activation energy 3.Be able to DRAW & describe what an enzyme is and what it does
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Question of the Day 10/30 What are the 3 things that affect enzyme activity?
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ENZYMES Three things that effect enzyme activity 1.Temperature 2. pH (acidic or basic) 3. Concentration (how many enzymes are working)
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Enzymes Enzyme – A protein that acts as a catalyst Catalyst – a substance that speeds up a chemical reaction without being used up or destroyed. Enzymes are responsible for almost ALL chemical reactions in living things (Organisms).
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Catalase 2H 2 O 2 Catalase 2H 2 O + O 2
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Enzymes How does an enzyme speed up a chemical reaction? ENZYMES speed up a chemical reaction by lowering the activation energy ()()
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Enzymes ENZYMES speed up a chemical reaction by lowering the activation energy (the amount of energy required to start a reaction) ENERGY TIME ACTIVATION ENERGY Products Reactants ACTIVATION ENERGY with ENZYME
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Enzymes Why do we put the enzyme above the arrow, and not on the side of the reactants or products? Example of a chemical equation Reactants Product AB A + B ENZYME
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ENZYMES Enzymes do not ever get used up. Enzymes do not die, but they can denature – the _________ is changed and they become unusable, ruined, and no longer work
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ENZYMES Question: If an enzyme is denatured, and its _____________ changes, what happens when it is cooled down? Can it work again?
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ENZYMES Enzymes do not ever get used up. Enzymes do not die, but they can denature – the _________ is PERMENANTLY changed and they become unusable, ruined, and no longer work
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What are the 2 things that chemical reactions can do? Hint they both start with a “B”
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Types of Enzymes Anabolic Enzyme – helps to build a molecule Example of reaction helped by anabolic enzymes:
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Enzymes Catabolic Enzyme – helps to break something down Example of reactions helped by catabolic enzymes:
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Enzyme Lab Check & complete Lab questions with group Work on Enzymes study guide
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Species of the day 10/30 Common Vampire Bat -Desmodus rotundus
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Species of the day 10/30 Common Vampire Bat -Desmodus rotundus Common Vampire Bat Range
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Species of the day 10/30 Common Vampire Bat -Desmodus rotundus The enzymes in this bat help it stay alive by lowering the ____________ __________ of its metabolic reactions (the chemical reactions that keep it alive).
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