enzymes Flashcards
what is an enzyme
An enzyme is a biological catalyst that speeds up chemical reactions without being altered in the process
what is a catalyst
Will allow a reaction to happen more quickly without being consumed
what is the activation energy
Is the initial energy needed to start a chemical reaction
what is an anabolic reaction
An anabolic reaction involves enzymes joining smaller molecules together to create larger molecules
what is an example of an anabolic reaction
DNA ligase is an example of an anabolic enzyme. It joins DNA molecules together to make longer stands
what is a catabolic reaction
A catabolic reaction involves enzymes breaking down molecules into smaller component parts.
what is an example of a catabolic reaction?
Amylase is an example of a catabolic reaction. It will break down starch into smaller sugar molecules
what are the types of release and stored energy reactions?
- exergonic reactions
- endergonic reactions
what is an exergonic reaction
When complex molecules are being broken down and energy is released
what is an endergonic reaction
When simple molecules are being joined together and energy is being absorbed.
how do enzymes work
Enzymes have a specific shape which allows them to bind to a specific substrate. The enzyme will bind the substrate at the active site. The enzyme and substrate will chemically bind together to form the enzyme-substrate complex.
what is it called when the enzyme and substrates come together
enzyme-substate complex
what are the two different enzyme activation models
- lock and key model
- induced fit model
what are the lock and key model
The enzyme will bind specific substrates due to the complementary shape. When bound the reaction commences, creating the different products. The products are released and the enzyme is unchanged.
draw a diagram representing the lock and key model
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