Digestive system — Paper 2 · IGCSE Biology (9-1) 0970

14 Which row shows an enzyme with the correct site of production and products? enzyme product(s) enzyme produced by of digestion A amylase salivary glands amino acids B amylase stomach sugar C protease salivary glands sugar D protease stomach amino acids

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2018

13 The cholera bacterium produces a toxin that results in water entering the alimentary canal and causing diarrhoea. The diagram shows the human alimentary canal. Into which region are chloride ions secreted as a result of the toxin? A D B C

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2019

13 The activity of amylase is measured in four parts of the alimentary canal. Which two parts have the most amylase activity? A colon and duodenum B colon and stomach C mouth and duodenum D stomach and mouth

1 marks

Answer: C

This question in 0970/21 May/June 2020

9 The diagram shows the four types of human tooth. 1 2 3 4 incisor canine premolar molar Which teeth are used for grinding food? A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1

1 marks

Answer: C

This question in 0970/22 May/June 2020

16 The diagram shows part of the human body. X Y Which statement about organs X and Y is correct? A X absorbs more water from food than Y. B X does not absorb water from food. C Y absorbs more water from food than X. D Y does not absorb water from food.

1 marks

Answer: A

This question in 0970/22 May/June 2021

14 The diagram shows part of the alimentary canal and associated organs. Where does most water absorption take place? D A C B

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2021

14 In which part of the alimentary canal does ingestion take place? A anus B liver C mouth D stomach

1 marks

Answer: C

This question in 0970/21 May/June 2022

14 Which process involves the removal of material from the rectum? A egestion B ingestion C chemical digestion D mechanical digestion

1 marks

Answer: A

This question in 0970/22 May/June 2022

14 The graph shows the concentration of maltose in different parts of the alimentary canal. X maltose concentration mouth stomach small intestine distance through the alimentary canal What causes the change in concentration at X? A absorption of maltose B action of amylase C action of maltase D assimilation of maltose

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2022

14 Which statement about physical digestion is correct? A It increases the surface area of food. B It involves enzymes. C It takes place in the mouth only. D It produces smaller molecules.

1 marks

Answer: A

This question in 0970/21 May/June 2023

14 Which structure is the duodenum? D A C B

1 marks

Answer: C

This question in 0970/22 May/June 2023

13 The diagram shows the teeth in the lower jaw of a human. Which tooth is a premolar? B C A D

1 marks

Answer: A

This question in 0970/22 Oct/Nov 2023

12 The diagram shows part of the alimentary canal and associated organs. Which labelled part stores bile? D A B C

1 marks

Answer: C

This question in 0970/21 May/June 2024

11 What is the function of trypsin in digestion? A It catalyses the breakdown of maltose in the mouth. B It catalyses the breakdown of maltose in the small intestine. C It catalyses the breakdown of protein in the small intestine. D It catalyses the breakdown of protein in the stomach.

1 marks

Answer: C

This question in 0970/21 May/June 2025

11 In which parts of the digestive system does physical digestion occur? 1 2 3 4 A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 4 only

1 marks

Answer: B

This question in 0970/22 May/June 2025

7 Which function is performed in the duodenum? A assimilation B digestion C egestion D ingestion

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2025

8 The graph shows the changes in pH in the oesophagus, stomach and duodenum. 12 11 10 9 8 X 7 pH 6 5 4 3 2 1 0 oesophagus stomach duodenum region of the alimentary canal Which substance causes the change in pH at the point labelled X? A bile B gastric juice C glucagon D trypsin

1 marks

Answer: A

This question in 0970/22 Oct/Nov 2025

9 Which row names a small molecule and where that molecule is absorbed in the digestive system? name of the small . . colon small molecule intestine amino acid x key / = molecule is absorbed glucose maltose X = molecule is not absorbed \ \ x Kk SK water

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2025

15 The diagram shows the human digestive system. Where do cholera bacteria cause the secretion of chloride ions? mouth A B D C anus

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2025