
Factors affecting Enzymes
Authored by A. Apple-Knight
Biology
10th - 12th Grade
Used 150+ times

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1.
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1 min • 1 pt
Enzymes
Enzymes are protein molecules made by living cells.
They are _______________ ________________ which speed up (but are not changed by) a chemical reaction.
2.
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1 min • 1 pt
Enzymes are coiled into a 3D shape (tertiary structure).
Enzymes posses an ____________ __________ - to which another molecule can bind.
3.
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1 min • 1 pt
The other molecule known as the _________________ fits perfectly into the active site to form an ENZYME - SUBSTRATE COMPLEX
4.
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1 min • 1 pt
Each enzyme acts on ________ substrate - They are specific- like a lock and a key .
5.
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1 min • 1 pt
Temperature and enzyme activity
At low temperatures the reaction occurs slowly because enzyme and substrate molecules are moving slowly.
The substrate and enzyme active site will not ____________ very often so binding is a rare event.
6.
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1 min • 1 pt
As temperature increase, collisions occur more frequently and with more energy - so the rate of reaction _____________.
7.
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1 min • 1 pt
BUT above a certain temperature, the structure of the enzyme changes.
The enzyme then loses its shape/unfolds as does the active site. This means the enzyme activity is reduced and the enzyme is said to be ________________.
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