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This is for the following paper: 4BI1 - 1B
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Disclaimer: This document was created by department heads with many years of experience teaching the
Pearson Edexcel IGCSE Biology course. We cannot however guarantee that it is an accurate representation
of the Summer 2024 examinations and students should not treat it as such. Please use this as an aid, alongside
other methods of revision.
Pearson Edexcel International GCSE (9-1)
Friday 10 May 2024
Morning (Time: 2 hours)
Biology
Unit: 4BI1
Paper: 1B
You must have:
Calculator, ruler
Instructions
• Use black ink or a ballpoint pen.
• Answer all questions.
• Answer the questions in the spaces provided.
○ There may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
• The total mark for this paper is 110.
• The marks for each question are shown in brackets.
○ Use this as a guide as to how much time to spend on each question.
Advice
• Read each question carefully before you start to answer it.
• Write your answers neatly and in good English.
• Try to answer every question.
• Check your answers if you have time at the end.
1. The diagram below shows the alimentary canal and associated organs.
(a) Name the structures labelled A, B and C. (3)
(b) What is the primary function of the mouth in the digestive system? (1)
☒ A Absorption of nutrients
☒ B Production of digestive enzymes
☒ C Mechanical digestion of food
☒ D Absorption of water
2
, (c) Which enzyme, present in saliva, begins the digestion of starch? (1)
☒ A Lipase
☒ B Protease
☒ C Amylase
☒ D Pepsin
(d) What is the function of villi in the ileum? (1)
☒ A To produce digestive enzymes
☒ B To increase surface area for absorption
☒ C To secrete bile
☒ D To store waste
The diagram below shows a ball of food called a bolus moving through the gut.
(e) Explain how a bolus is moved through the gut. (2)
3
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