Enzyme Substrate Concentration

Question 1

What happens to a reaction when enzymes are added and is the limiting factor?

Answer 1

Rate of reaction increases because:
more successful collisions 
More active sites available for substrates
more enzyme substrate complexes
More product formed

Question 2

What happens to a reaction when substrates are added and is the limiting factor?

Answer 2

Rate of reaction increases because:
more successful collisions 
More active sites can be filled up
more enzyme substrate complexes
More product formed

Question 3

What happens to a reaction when substrates are added and is not the limiting factor?

Answer 3

There is no change to the reaction rate:
There are no more free enzymes to bind to
There will be no extra enzyme substrate complexes
So no more product is made

Question 4

What happens to a reaction when enzymes are added and is not the limiting factor?

Answer 4

There is no change to the reaction rate:
They are all used up in the reaction
There will be no extra enzyme substrate complexes
So no more product is made