Edexcel IGCSE Biology · Spec 2.29-2.31
Digestive Enzymes and Bile
How amylase and maltase convert starch into glucose, what protease and lipase produce, where the enzymes are made, and the two roles of bile.
Biology revision video
Digestive Enzymes and Bile
Prefer to watch on YouTube? Open this video on YouTube.
Spec 2.29-2.31
What you need to know
- Explain how amylase and maltase convert starch into glucose
- Recall the substrates and products of protease and lipase
- Identify where the digestive enzymes are made
Active recall
Quick check
Answer each question before opening the answer.
Which two enzyme steps convert starch into glucose?
Amylase converts starch into maltose; maltase then converts maltose into glucose.
State two functions of bile.
It neutralises stomach acid (it is alkaline) and it emulsifies fats to increase their surface area for lipase.
Biology video companion
Keep your notes and exam practice together
The free Biology workbook follows every video in specification order.