Enzymes Flashcards
What conditions changes how well an enzyme works?
Temperature
PH
What do enzymes do?
They control cell reactions
What do you have to be careful with when raising the temperature on the enzyme?
It can cause the cell to become damaged
What act as biological catalysts?
Enzymes
What is a catalyst?
Catalyst is a substance that speeds up a reaction without being changed or used up in the reaction itself
Every different biological reaction has the same enzyme designed for it, is this true or false?
False, each enzyme is different to each biological reaction
What is the substrate?
The substrate is the molecule made in the reaction
What is an active site?
The active site is the part where it joins onto its substrate to catalyse the reaction
Enzymes usually only work with one substrate , is this true or false
True
Explain why?
For the enzyme to work the substrate has to fit into the active site. if the substrate shape doesn’t match the active site Shape the reaction won’t be catalysed, this is called the lock and key mechanism because the substrate fits into the enzyme just like a key fits into a lock
What Is the optimum temperature
Where The enzyme is most active
Why does heat make the enzyme work faster
Heat means enzymes and the substrate particles have more energy
What happens when you use low temperatures
It has an opposite effect, there is a lower collision rate and so a slower reaction
What makes the active site change shape?
Heat, meaning it’s substrate shape won’t be able to fit
What happens when active site changes shape
Enzyme cannot function properly
