B3

Question 1

What are enzymes

Answer 1

Enzymes are catalysts produced by living things.

Question 2

How can you speed up chemical reactions?
What problems would this have?
What do living things produce and how do they act?

Answer 2

• You can speed up the reaction by raising the temperature
• But this would speed up useful reactions and unwanted reactions too.
• So living things produce biological catalysts which act as biological catalysts.

Question 3

What do enzymes have that is special? What do this special feature allow?

Answer 3

Enzymes have special shapes so they can catalyse reactions