The Digestive system

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1 The Digestive system Question Paper 1 Level Subject Exam Board Topic Sub-Topic Booklet GCSE Biology CCE Enzymes and digestion The digestive system Question Paper Time llowed: Score: Percentage: 67 minutes /56 /100

2 Foundation Tier 1

3 1 (a) Teeth begin the mechanical digestion of food into smaller pieces. (i) Choose the part of the digestive system where mechanical digestion begins. Draw a circle around the correct answer. stomach colon buccal cavity liver mylase acts on the starch in bread. (ii) Suggest how breaking the bread into smaller pieces affects the speed of action of amylase. Explain your answer. Speed Explanation [2] Starch is broken down into glucose. The diagram shows the absorption of glucose into the blood. Key starch glucose blood Chief Examiner (b) Use information from the diagram to explain why starch needs to be digested. [2] 2

4 The diagram shows part of the digestive system. B Source: CCE Look at the diagram. (c) Complete the table by naming parts and B. Give the function of part B. Part Name Function absorbs digested food B [3] 3

2 The diagram shows part of the digestive system. liver gall bladder B GCSE Biology for CCE second edition by James Napier. Published by Hodder Education in 2011. ISBN: 9780340983805.

5 2 The diagram shows part of the digestive system. liver gall bladder B GCSE Biology for CCE second edition by James Napier. Published by Hodder Education in ISBN: Reproduced by permission of Hodder Education. Look at the diagram. (a) (i) Name parts and B. B Gastric juice is produced by one part of the digestive system. It contains chemicals that help digest proteins. (ii) Write the letter G on the diagram to show the part of the digestive system that produces gastric juice. 4

6 (iii) Name two of the chemicals in gastric juice that help the digestion of proteins. Draw circles around the correct answers. mucus acid protease amylase [2] (b) Bile helps digest fats. (i) Name the organ that produces bile. n experiment was set up to investigate the effect of bile on the action of lipase. Two test tubes containing milk and lipase were placed in a water bath at 25 C. Bile was added to test tube B. The time taken to digest the fat in the milk was recorded. B water bath 25 C milk + lipase milk + lipase + bile CCE (ii) What should be added to test tube to make this a fair test? 5

7 The results are shown in the table. Test tube Time taken to digest fat/min 30 B 10 (iii) What can you conclude from these results? The diagram shows bile emulsifying a single large fat droplet. bile single large fat droplet CCE Look at the diagram. (iv) Describe what happens when fats are emulsified. (v) Explain how emulsification helps lipase digest fats. 6

8 3 The diagram shows part of the human digestive system. ileum B rectum CCE Look at the diagram. (a) Name parts and B. B (b) (i) What is the function of the ileum? (ii) What is the function of the rectum? 7

9 4 The diagram shows part of the human digestive system.. GCSE Biology for CCE by R McIlwaine & J Napier, published by Hodder & Stoughton, 2003 ISBN Reproduced by permission of Hodder Education. (a) Name part. The stomach contains gastric juice. (b) Name two substances found in gastric juice. and [2] (c) Describe how the colon is adapted for water absorption. 8

10 Higher Tier 9

11 5 The diagram shows a section through a villus. (a) Name part and describe its function. CCE [2] (b) The villus is adapted for absorbing digested food by maintaining a high concentration gradient. Explain how the villus maintains a high concentration gradient. [2] 10

12 (c) Describe one other adaptation of the villus and explain how it brings about absorption of digested food. [2] 11

13 6 The diagram shows a section through part of the ileum. epithelium B lymph vessels Diagram from Biology: a Modern Introduction by B S Beckett (OUP, 1976), copyright Oxford University Press 1976, reprinted by permission of Oxford University Press (a) Name the structure shown in the diagram. (b) Identify parts and B. Explain the role of each in the absorption of digested food. [2] B [2] 12

14 (c) How does the epithelium aid the absorption of digested food? 13

15 7 ( ) he diagram shows part of the digestive system. dapted from: GCSE human biology by Morton Jenkins, published by Letts Educational, 1997, ISBN Reproduced by permission of HarperCollins publishers. (i) ame parts and. he gall bladder stores bile. (ii) Give the function of bile and name the organ which produces it. [2] (iii) ame the process which pushes food along the intestine. 14

16 ( ) he diagram shows the blood supply to part of the human abdomen. (i) o ete t e i r to show the blood supply to and from the small intestine. [ ] (ii) ame blood vessels and C. C 15

17 ( ) he diagram Save summarises My Exams! the brea down The Home of of excess Revision amino acids. (i) ame the process which brea s down excess amino acids. 16

18 (ii) ame the organ where this process occurs. (iii) se the diagram to help explain what happens to the part of the amino acid bro en down in athway 1. [2] (iv) uggest why urea is removed from the body and describe how this occurs. [ ] 17

GBY11 28GBY1101 Biology. Unit 1 Foundation Tier [GBY11] FRIDAY 5 JUNE, AFTERNOON GBY11 TIME 1 hour 15 minutes.

*GBY11* *28GBY1101* Biology. Unit 1 Foundation Tier [GBY11] FRIDAY 5 JUNE, AFTERNOON *GBY11* TIME 1 hour 15 minutes. Centre Number Candidate Number Biology General Certificate of Secondary Education 2015 Unit 1 Foundation Tier *GBY11* [GBY11] FRIDAY 5 JUNE, AFTERNOON *GBY11* TIME 1 hour 15 minutes. INSTRUCTIONS TO CANDIDATES