1. Do not appreciate the awesomeness of enzymes!!!!

2. B2 Chapter 3 - Enzymes Learning objectives
Explain that enzymes are proteins that act as biological catalysts.
Describe the specificity of enzyme action.
Use the terms reactants and products when discussing enzyme activity.
Key words - substrate, enzyme, active site, enzyme-substrate complex, protein, catalyst

5. Enzymes are biological catalysts
Catalysts are chemicals that increase the rate of a reaction without getting used up themselves.
Enzymes are proteins (chains of amino acids) that are folded into complex shapes that allow smaller molecules to fit into them. The place where these substrate molecules fit is called the active site
Each enzyme only catalyses one particular reaction.

6. Enzymes
These biological catalysts are used to speed up reactions that occur in living things. E.g. photosynthesis, respiration, protein synthesis.

7. How do enzymes work? Lock and key theory
Enzymes have a specific 3D structure
They exactly match the shape of a molecule of substrate (the chemical being altered in the reaction)
Enzymes

8. Breakdown reaction Steps: 1. Substrate fits into active site of enzyme
2. Reaction takes place
3. Products leave active site, enzyme ready to work again

9. Synthesis reaction

10. Examples of enzymes in your body…
Use
Protease
Amylase
Lipase
Catalase

11. Examples of enzymes in your body…
Use
Protease (in the stomach)
Breaking down proteins
Amylase (in the mouth)
Breaking down carbohydrates
Lipase (in the intestines)
Breaking down fats
Catalase (in the liver)
Breaks down hydrogen peroxide

12. Enzymes act as biological catalysts
They occur inside cells or are secreted by the cells.
Catalase is the enzyme that catalyses the break down of hydrogen peroxide.
Catalase

13. respiration rate shape chain amino acid reactant amylase specificity
Write a scientific clue/definition for the words below. There can only be 1
correct ‘splat’ to your question.
respiration
rate
shape
chain
amino acid
reactant
amylase
specificity
protease
lock & key
biological
enzyme
product
protein
reaction
synthesis
catalyst
active site
substrate