Role of Enzymes Flashcards
What is an enzyme?
A biological catalyst
Catalase is an example of an [blank] enzyme
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Intracellular
Amylase is an example of an [blank] enzyme
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Extracellular
What is an extracellular enzyme?
An enzyme (e.g. amylase) which functions outside the cell from which it is produced
What is an intracellular enzyme?
An enzyme which functions inside the cell from which it originates
Most enzymes are [blank]
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Globular proteins
Anabolic and Catabolic reactions are examples of [blank]
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Metabolic reactions
What do anabolic reactions do?
They are involved in synthesis reactions
What do catabolic reactions do?
They are involved in the breaking down of large molecules
Metabolic reactions are catalysed by [blank]
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Enzymes
Define metabolism
The sum of all the different reactions taking place in a cell or organism
Explain the Lock and Key hypothesis
The shape of the enzyme’s active site is comlementary to the shape of the substrate molecule
The substrate molecule binds to the enzyme’s active site, forming a enzyme-subtrate complex
The enzyme breaks down the substrate molecule to form the enzyme-product complex
The products are released from the active site
Explain the induced fit theory of enzymes
As the subtrate molecule collides with the active site, it causes theb active site of the enzyme to change shape slightly to fit more closely around the substrate.
An enzyme-substrate complex is formed
