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Biology
Enzymes and Digestion (Section 2)
Question | Answer |
---|---|
Why do we need digestive enzymes? | To break down big, insoluble molecules into smaller, soluble ones |
What enzyme converts starch into maltose? | Amylase |
What enzyme converts maltose into glucose? | Maltase |
What enzyme converts proteins into amino acids? | Proteases |
What enzyme converts lipids into glycerol and fatty acids? | Lipases |
What 2 jobs does bile have? | 1. Neutralise stomach acid 2. Emulsify fats |
Where is bile produced? | The liver |
Why does bile need to make conditions alkaline in the digestive system? | Enzymes in the small intestine work best in alkaline conditions |
Why are fats emulsified? | To create a larger surface area for lipase to work on, making digestion faster |
What process is used to move food through the gut? | Peristalsis |
What is peristalsis? | Circular muscle contractions that squeeze food through the gut |