Activation Energy

Question 1

What do enzymes do?

Answer 1

Reduce the amount of activation energy needed, making the reactions happen at a lower temperature
Speeds up the rate of reaction

Question 2

What is an enzyme- substrate complex?

Answer 2

When a substance binds to an enzymes active site, an enzyme substrate complex is formed
This lowers the activation energy

Question 3

2 substrate molecules need to be joined

Answer 3

Attaching to the enzyme holds them close together
Reducing any repulsion between the molecules
So can bond more easily

Question 4

Catalysing a breakdown reaction

Answer 4

Fitting into the active site puts strain on bonds in the substrate
Means the substrate molecule breaks up more easily

Question 5

What is activation energy?

Answer 5

Certain amount of energy need to be supplied to the chemical before the reaction will start
Heat

Question 6

What is metabolism?

Answer 6

The sum total of all of the chemical reactions that happen in the body

Question 7

What are the 2 main types of chemical reaction?

Answer 7

Catabolic

Anabolic

Question 8

What are anabolic reactions?

Answer 8

Reactions that make larger molecules from smaller ones

Question 9

What are catabolic reactions?

Answer 9

Splitting molecules up into smaller ones