Enzymes Flashcards
What is an enzyme?
Complex protein which is a biological catalyst that is not changed by its reactions
What is the function of an enzyme?
Speed up rate of reaction
Where are enzymes made?
Ribosomes of cell
What is the active site?
Site on enzyme that binds with substrate
What are the two ways in which enzymes work?
Lock and key
Induced fit
What is the lock and key
Enzyme binds to active site like a key in a lock
What is the induced fit model?
Enzymes and substrate may not fit perfectly together so the enzyme will slightly change shape to join substrate
What can happen if the enzyme changes shape slightly, give an example?
Certain genetic disorders can occur due change in shape to the function changes
E.g. sickle cell anaemia
What are the 3 optimum conditions for enzymes to work?
Ph levels
Temperature
Concentration
What is optimum temperature for enzymes?
40 degrees Celsius
What PH level do enzymes work best at?
8ph is optimum
How does a competitive inhibitor stop reactions occurring?
It binds to the active site to prevent the substrate binding
