Enzymes+Stress

Question 0

Describe the induced fit hypothesis (4 marks)

Answer 0

1) The active site of the enzyme is not complementary to the substrate.
2) The enzyme is flexible and can change shape.
3) so this means that the enzyme can flex/mould around the substrate.
4) this puts strain on the substrate, the chemical bonds are stretched and distorted making the substrate weaker.
It will eventually break to form the product.

Question 1

Describe the Lock and Key hypothesis (4 marks)

Answer 1

1) The substrate is complementary to the active site of the enzyme.
2) This means that the substrate binds straight to the active site-
To form an enzyme-substrate complex.
3) Only one substrate can bind to the active site as its shape is specific.