Action and Specificity (Leaving Cert Biology): Flashcards
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Active site of enzyme
Active site of enzyme
Region where substrate binds and reactions occur
What % of enzyme is the active site?
What % of enzyme is the active site?
10-20%
Shape of active site relative to substrate
Shape of active site relative to substrate
Complementary
Induced fit model
Induced fit model
Active site changes shape slightly when substrate binds
Enzyme-substrate complex
Enzyme-substrate complex
Enzyme and substrate bonded together at active site
Substrate molecules enzyme can process per second
Substrate molecules enzyme can process per second
Several thousand
Enzyme specificity
Enzyme specificity
Enzyme works with only one type of substrate
Denaturation
Denaturation
Permanent loss of enzyme function due to shape change
Is denaturation reversible?
Is denaturation reversible?
No, it's permanent
Optimal temperature for human enzymes
Optimal temperature for human enzymes
Around 37°C
Temperature causing permanent enzyme damage
Temperature causing permanent enzyme damage
Above 40°C
Substrate that catalase breaks down
Substrate that catalase breaks down
Hydrogen peroxide
Products of catalase reaction
Products of catalase reaction
Water and oxygen
Examples of where catalase is found
Examples of where catalase is found
Radishes, celery, potatoes, most living organisms