BIOL4004 CB Part A Explain how enzymes catalyse reactions (50%) (2016)

Question 1

Explain how enzymes catalyse reactions:

Answer 1

[1]
Enzymes are catalyse by specific shape or tertiary structure, held in place by several types of bonds.

[2]
This results in active site shaped to fit substrate

[3]
Enzymes and substrate bind to form enzyme substrate complex

[4]
The formation of enzyme substrate then complex lowers the activation energy of a reaction

Question 2

How is the activation energy of a reaction lowered:

Answer 2

Achieved through:

1.
Substrate binds to active sites, orientating substrate molecules in the correct way

2. Orientates inducing strain in the substate molecule
3. Stabilising the transition of the substrate