Digestion — Paper 2 · IGCSE Sciences - Co-ordinated (9-1) 0973

6 What is the effect of bile on food after it leaves the stomach? A acidifies the food entering the duodenum B activates enzymes which digest glycerol C increases the surface area of fats for digestion D provides fat for digesting enzymes

1 marks

Answer: C

This question in 0973/21 Oct/Nov 2019

6 Much of the internal surface of the human small intestine is covered with villi. What is the function of villi? A excretion of waste into the intestine B secretion of enzymes into the intestine C to improve blood circulation in the intestine walls D to increase the internal surface area of the intestine

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2020

6 Protein shakes can be used by athletes to supplement their diet. They are a drink made by dissolving protein powders in water or milk. Which types of digestion will be required before they can be absorbed? chemical mechanical digestion digestion Jv v key /=yes 0 Oo WwW > Jv x x v X=no x x

1 marks

Answer: B

This question in 0973/21 May/June 2021

6 Which row about secretions in the alimentary canal is correct? substance area of action secreted alimentary canal A amylase breaks down fats into fatty acids and glycerol small intestine B bile breaks down fats into fatty acids and glycerol small intestine C hydrochloric acid breaks down proteins to amino acids stomach D protease breaks down proteins to amino acids stomach

1 marks

Answer: D

This question in 0973/22 May/June 2021

6 The diagram shows part of the digestive system. P Q R S Which labelled parts produce digestive enzymes, absorb water and store bile? produce digestive absorb water store bile enzymes A P Q R B Q R P C R S P D S P R

1 marks

Answer: C

This question in 0973/21 May/June 2022

4 Which type of molecules speed up chemical digestion? A carbohydrates B enzymes C hormones D fatty acids

1 marks

Answer: B

This question in 0973/22 May/June 2023

6 What is one of the functions of bile? A denaturing lipase B digesting fats C emulsifying fats D increasing acidity

1 marks

Answer: C

This question in 0973/22 May/June 2023

6 Pancreatic insufficiency is a condition that occurs when the pancreas is unable to produce enough enzymes. Which secretions are reduced due to this condition? A amylase, lipase and protease B amylase, lipase and bile C amylase, insulin and protease D glucagon, insulin and protease

1 marks

Answer: A

This question in 0973/21 Oct/Nov 2023

6 A student investigates the effect of size of gelatine cubes on the rate of digestion by protease. The student places a cube of gelatine with a volume of 8 cm3 into a beaker of protease. The time taken for the cube to be digested is recorded. A second 8 cm3 cube of gelatine is cut up into eight 1 cm3 cubes to represent mechanical digestion and the experiment is repeated. The results are shown. time taken to digest gelatine the gelatine / minutes one 8 cm3 cube 320 eight 1 cm3 cubes 80 Which statements are correct? 1 Cutting up the 8 cm3 cube increases the surface area exposed to the enzyme. 2 Chemical digestion cannot occur unless mechanical digestion also occurs. 3 Mechanical digestion increases the rate of chemical digestion. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: C

This question in 0973/22 May/June 2024

6 The diagram shows a villus. P Q What are structures P and Q and which substances do they absorb? structure substance absorbed amino fatty capillary lacteal acids acids A P Q P Q B P Q Q P C Q P P Q D Q P Q P

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2024

6 Which organ produces an alkaline mixture that neutralises gastric juices? A salivary glands B large intestine C liver D stomach

1 marks

Answer: C

This question in 0973/21 May/June 2025

7 Starch is chemically digested into maltose by the enzyme amylase. What are the properties of the maltose molecules? A large and insoluble B large and soluble C small and insoluble D small and soluble

1 marks

Answer: D

This question in 0973/22 May/June 2025

7 Which row about digestion is correct? type of digestion before digestion after digestion A chemical large pieces of food small pieces of food B chemical large insoluble molecules small soluble molecules C physical large soluble molecules small insoluble molecules D physical large pieces of food small soluble molecules

1 marks

Answer: B

This question in 0973/21 Oct/Nov 2025