Flashcards
Edexcel GCSE Biology - Enzymes
Flashcards do conjunto (20)
- 1What is an Enzyme?Biological Catalysts that speed up chemical reactions without being used up
- 2Explain how the Lock and Key Model of an Enzyme Works> The substrates attach to the active site of an enzyme
> This creates an enzyme-substrate-complex
> The enzyme then breaks down the substrate into products - 3What is an Example of a Substance being Broken Down and Into What?> Protein into Amino Acids
> Starch to sugars
etc. - 4What is an Example of an Enzyme?> Amylase
> Lipase
> Maltase
> Protease
Basically, they usually end in -ase - 5Describe the Shape of a Graph Correlating Enzyme Activity and Temperature> Gradual Increase Until the Optimum
> Lesser Gradient Reaching the Optimum
(Basically rounded top)
> Sharp Decrease After the Optimum - 6Describe the Shape of a Graph Correlating Enzyme Activity and pH> Sharp Increase Until the Optimum
> Lesser Gradient Reaching the Optimum
(Basically rounded top)
> Gradual Sharp Increase After Reaching the Optimum - 7Describe the Shape of a Graph Correlating Enzyme Activity and Substrate Concentration> Gradual Increase Until the Optimum
> Lesser Gradient Reaching the Optimum
(Basically rounded top)
> Constant Enzyme Activity - 8Why does the Enzyme Activity Decrease when the Temperature is Above the Optimum?> Enzymes Become Denatured
> Meaning the Active Site's Shape Changes
> Substrates cannot Bond with the Active Site
> Less Enzyme-Substrate Complexes - 9Why does the Enzyme Activity Decrease when the pH is Above the Optimum?> Enzymes Become Denatured
> Meaning the Active Site's Shape Changes
> Substrates cannot Bond with the Active Site
> Less Enzyme-Substrate Complexes - 10Why does the Enzyme Activity Stay Constant when the Substrate Concentration is Above the Saturation Point?> All Enzymes are Enzyme-Substrate Complexes
> There's no more Enzymes Available for Substrates to Bond with - 11Why does the Enzyme Activity Increase as the Temperature Rises Below the Optimum?> The Molecules Slow Down
> There is Less Kinetic Energy Due to there being Less Temperature
> Less Collisions with the Active Site
> Less Enzyme-Substrate Complexes - 12Why does the Enzyme Activity Decrease as the pH Decreases Below the Optimum?> Enzymes Become Denatured
> Meaning the Active Site's Shape Changes
> Substrates cannot Bond with the Active Site
> Less Enzyme-Substrate Complexes - 13Why does the Enzyme Activity Increase as the Substrate Concentration Increases Below the Saturation Point?> More Substrates so More Chances of Collisions with the Enzyme's Active Site
> More Enzyme-Substrate Complexes - 14What is an Enzyme-Substrate Complex?The Enzyme and the Substrate Bound Together
- 15What is the Optimum?The Point where there is the Most Enzyme Activity
- 16What is the Saturation Point?The Starting Point where Enzyme Activity Becomes Constant due to Substrate Concentration
- 17What is an Active Site?The Part of the Enzyme that the Substrate Binds to
- 18What does Denatured Mean?The Active Site's Shape has Changed
- 19Why don't Denatured Enzymes Work?The Active Site's Shape does not Match with the Substrates Shape, meaning they cannot Bind
- 20What is Diffusion? (I know it's not to do with Enzymes but there was no where else to put this question ok)The Movement of Particles from Low Concentration to High Concentration
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- Descrição
- GCSE Biology FlashCards sobre Edexcel GCSE Biology - Enzymes, criado por Malachy Moran-Tun em 13-05-2019.
- Criado por
- Malachy Moran-Tun
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