Biology- Enzymes

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  • Created by: Kitsune
  • Created on: 07-07-16 10:22
What reactions build up molecules?
Anabolic molecules
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What reactions break down molecules?
Catabolic reactions
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What is a catalyst?
A substance that speeds up the reaction but doesn't change the product and remains unchanged itself
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What are enzymes?
Proteins, that act as biological catalysts
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What does the enzyme work on?
The substrate
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Where does the substrate fit in?
The active site
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Can enzymes work on different substrates?
No, they are specific
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Give examples of intracellular enzymes
Catalase (breaks H2O2), phosphorylase (builds glucose into starch)
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Give examples of extracellular enzymes
Lipase (breaks fats), amylase (breaks starch into maltose)
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What are the two factors that affect enzymes?
Temperature and pH
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How does temperature affect enzyme activity?
Higher temperature speeds up the movement of substrates and enzymes so they are more likely to collide
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How can enzymes become denatured by temperature?
They vibrate so much as they take in energy that their active site becomes deformed
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How does pH affect enzymes?
Changing pH may result in denaturation
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What makes the binding of a substate and enzyme more likely?
Activators
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What makes the binding of a substate and enzyme less likely?
Inhibitors
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Why are enzymes os useful?
They can be reused and they are specific
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Other cards in this set

Card 2

Front

What reactions break down molecules?

Back

Catabolic reactions

Card 3

Front

What is a catalyst?

Back

Preview of the front of card 3

Card 4

Front

What are enzymes?

Back

Preview of the front of card 4

Card 5

Front

What does the enzyme work on?

Back

Preview of the front of card 5
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