Action and Specificity (Leaving Cert Biology): Flashcards
📚Flashcards
Practise the cards
12 cards from this deck
ShowHide
Practise the cards
12 cards from this deck
Active site
Active site
Region where enzyme binds substrate and reactions occur
Active site shape
Active site shape
Complementary 3D shape to substrate
What % of enzyme is the active site?
What % of enzyme is the active site?
10-20%
Induced fit model
Induced fit model
Active site changes shape slightly when substrate binds
Enzyme-substrate complex
Enzyme-substrate complex
Enzyme and substrate bound together
Enzyme processing speed
Enzyme processing speed
Thousands of substrate molecules per second
Enzyme specificity
Enzyme specificity
Each enzyme works with one substrate type only
Denaturation
Denaturation
Permanent loss of enzyme function from shape change
Temperature causing enzyme denaturation
Temperature causing enzyme denaturation
Above 40°C
Catalase function
Catalase function
Breaks down hydrogen peroxide into water and oxygen
Sources of catalase
Sources of catalase
Radishes, celery, potatoes, most living organisms
Visible effect of catalase on hydrogen peroxide
Visible effect of catalase on hydrogen peroxide
Rapid foaming and bubbling as oxygen is released