Cambridge IGCSE Biology (BES) 0438 — 2017 Oct/Nov Paper 1 · Variant 1

This document consists of 15 printed pages and 1 blank page. IB17 11_0438_11/FP © UCLES 2017 [Turn over *3127983366* Cambridge International Examinations Cambridge International General Certificate of Secondary Education BIOLOGY (US) 0438/11 Paper 1 Multiple Choice (Core) October/November 2017 45 minutes Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Center number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Electronic calculators may be used.

2 © UCLES 2017 0438/11/O/N/17 1 Which process in plant cells uses chlorophyll? A growth B nutrition C movement D respiration 2 The table shows the scientific names of four members of the cat family. common name scientific name leopard Panthera pardus lion Panthera leo ocelot Leopardus pardalis tiger Panthera tigris Which statement is correct? A All four cats are members of the same species. B The leopard and the ocelot are members of the same genus. C The leopard, lion and tiger are members of the same genus. D The leopard, lion and tiger are members of the same species. 3 The diagram shows a type of tooth. crown root Use the key to identify the tooth. 1 the root is divided into two parts … go to 2 the root is not divided into two parts … go to 3 2 the height of the crown is greater than the length of the root … A the height of the crown is less than the length of the root … B 3 flattened crown … C ridged crown … D

3 © UCLES 2017 0438/11/O/N/17 [Turn over 4 The diagram shows a student’s drawing of guard cells. Which label is not correct? A cell membrane B cytoplasm C vacuole D cell wall 5 The diagrams show a leaf and its internal structure. 1 2 3 What are the levels of organization of the labeled structures? 1 2 3 A cell tissue organ system B organ cell tissue C organ system tissue cell D tissue cell organ

4 © UCLES 2017 0438/11/O/N/17 6 The diagram shows an insect as seen using the low power lens of a microscope. The actual diameter of the circle is 0.3 cm. What is the approximate size of this insect in millimeters? A 0.1 mm B 1.0 mm C 2.0 mm D 3.0 mm 7 The diagram shows part of a section through a leaf. Which arrow represents the diffusion of oxygen during photosynthesis? leaf cells xylem C D B A 8 What helps to support plants? A pressure inwards on the cell vacuoles B pressure inwards on the chloroplasts C pressure outwards on the cell walls D pressure outwards on the nuclei

5 © UCLES 2017 0438/11/O/N/17 [Turn over 9 Which of these is digested by protease? A B C D key amino acid glucose chemical bond 10 Which enzyme is used to produce clear apple juice? A amylase B lipase C pectinase D protease 11 What is the optimum pH for stomach enzymes? A pH 2 B pH 7 C pH 9 D pH 12 12 What are the raw materials necessary for photosynthesis? A carbon dioxide and water B light and a suitable temperature C oxygen and carbon dioxide D water and a suitable temperature 13 In plants, which substance contains magnesium ions? A cellulose B chlorophyll C hemoglobin D starch 14 What must be increased in the diet of a person suffering from constipation? A fats B fiber C iron D protein

6 © UCLES 2017 0438/11/O/N/17 15 Which chemical reaction takes place in the mouth? A Fats are digested into fatty acids and glycerol. B Fats are digested into simpler sugars. C Starch is digested into simpler sugars. D Starch is digested into amino acids. 16 The diagram shows the human alimentary canal, with a string marked in meters beside it. esophagus anus 0 1 2 3 4 5 6 7 8 9 string marked in meters How long is the small intestine? A 2 m B 6 m C 8 m D 9 m 17 What is a description of transpiration? A exchange of gases between the leaf and the atmosphere B loss of water vapor from the leaves and stems of a plant C movement of water from the roots to the leaves D movement of water through the cells of the leaf

7 © UCLES 2017 0438/11/O/N/17 [Turn over 18 Which tissue transports water from the roots to the leaves in a plant? A cortex B epidermis C mesophyll D xylem 19 On which organ is an ECG performed? A brain B colon C ear D heart 20 The diagram shows a cross-section through a human blood vessel. elastic and fibrous connective tissue muscle layer Which type of blood vessel does the diagram show? A an artery B a capillary C a vein D a ventricle 21 Which are both chemical barriers to the transmission of pathogens? A mucus and stomach acid B mucus and white blood cells C skin and hairs in the nose D skin and stomach acid

8 © UCLES 2017 0438/11/O/N/17 22 The table shows the approximate composition of inspired and expired air. gas percentage of gas in inspired air percentage of gas in expired air P 78.10 78.10 Q 20.90 16.00 R variable variable S 0.04 4.00 What is the name of gas S? A carbon dioxide B nitrogen C oxygen D water vapor

9 © UCLES 2017 0438/11/O/N/17 [Turn over 23 In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown. balloon P Q balloon yeast and water sugar, yeast and water What would happen to each balloon after one day? P Q A P Q B P Q C P Q D

10 © UCLES 2017 0438/11/O/N/17 24 The diagram represents the exchange of gases during breathing and during respiration in the body. carbon dioxide in blood oxygen in blood carbon dioxide oxygen X Y What is represented by X and by Y? X Y A lungs air B lungs body cells C body cells air D body cells lungs 25 The table shows information about urea. Which row is correct? substance that urea is made from organ that makes urea organ that excretes urea A amino acids kidney bladder B amino acids liver kidney C fatty acids kidney bladder D fatty acids liver kidney 26 What is the most important function of sweating? A to remove excess heat from the body B to remove excess salts from the body C to remove excess urea from the body D to remove excess water from the body

11 © UCLES 2017 0438/11/O/N/17 [Turn over 27 What shows the order in which these structures are involved in a reflex action? A effector → motor neuron → relay neuron → sensory neuron → receptor B effector → sensory neuron → motor neuron → relay neuron→ receptor C receptor → sensory neuron → relay neuron → motor neuron → effector D receptor → motor neuron → sensory neuron → relay neuron→ effector 28 The diagram shows a person sweating in hot weather. What part is played by sweat glands during the process of sweating? A effector B receptor C sense organ D stimulus 29 The diagram shows the gas exchange surface of a person who has just smoked a cigarette. Substance P can cause cancer. P moisture alveolus wall What is substance P? A carbon dioxide B carbon monoxide C nicotine D tar

12 © UCLES 2017 0438/11/O/N/17 30 Which method of birth control works by preventing an egg from being released? A condom B contraceptive pill C monitoring body temperature D vasectomy 31 Which environmental factor is not always a requirement for seed germination? A light B oxygen C suitable temperature D water 32 Four processes involved in labor and birth are shown. 1 cutting the umbilical cord 2 contraction of muscles in the uterus wall 3 dilation of the cervix 4 passage of the baby through the vagina In which sequence do these events normally occur? A 2 → 3 → 1 → 4 B 2 → 3 → 4 → 1 C 3 → 2 → 1 → 4 D 3 → 2 → 4 → 1 33 In some mammals the allele for brown coat color is dominant to the allele for white coat color. Which percentage of offspring will be white if a cross is made between two heterozygous mammals? A 0% B 25% C 50% D 100%

13 © UCLES 2017 0438/11/O/N/17 [Turn over 34 Which term is defined as a length of DNA that codes for a protein? A amino acid B chromosome C gene D mutation 35 What makes tongue rolling an example of discontinuous variation? A A person can roll their tongue only when they are young. B There are many different types of tongue rollers. C Tongue rolling has to be learnt. D Tongue rolling is something that a person either can or cannot do. 36 What is shown by the widest block in a pyramid of numbers for a grassland ecosystem? A all the consumers in the pyramid B the carnivores in the pyramid C the organisms at the top of the pyramid D the producers in the pyramid 37 A food chain is shown. potato plant → slug → hedgehog By which process is energy transferred from the potato plant to the slug? A egestion B excretion C ingestion D photosynthesis

14 © UCLES 2017 0438/11/O/N/17 38 A farmer put some fertilizer on his field. Some of the fertilizer drained into a nearby lake. land with fertilizer lake plants What is the effect of the fertilizer on the growth of the crop plants in the field and the plants in the lake? crop plant growth lake plant growth A decreased decreased B decreased increased C increased decreased D increased increased 39 The diagrams show the depth and rate of breathing in a person at 12.00 pm and 1.00 pm. volume 0 10 20 30 time / seconds 40 50 60 70 volume 0 10 20 30 time / seconds 12.00 pm 1.00 pm 40 50 60 70 0.5 dm3 What happens to the person’s breathing between 12.00 pm and 1.00 pm? depth of breathing rate of breathing A decreases decreases B decreases increases C increases decreases D increases increases

15 © UCLES 2017 0438/11/O/N/17 40 The table shows the amount of carbon dioxide in the atmosphere in three different years. year 1930 1980 1990 carbon dioxide / parts per million 300 330 370 What is the most likely cause of this change? A destruction of rainforests B increased use of fertilizers containing nitrogen C pollution of air by sulfur dioxide D rise in the sea level

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® IGCSE is a registered trademark. This document consists of 3 printed pages. © UCLES 2017 [Turn over Cambridge Assessment International Education Cambridge International General Certificate of Secondary Education BIOLOGY (US) 0438/11 Paper 1 Multiple Choice (Core) October/November 2017 MARK SCHEME Maximum Mark: 40 Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge International will not enter into discussions about these mark schemes. Cambridge International is publishing the mark schemes for the October/November 2017 series for most Cambridge IGCSE®, Cambridge International A and AS Level components and some Cambridge O Level components.

0438/11 Cambridge IGCSE – Mark Scheme PUBLISHED October/November 2017 © UCLES 2017 Page 2 of 3 Question Answer Marks 1 B 1 2 C 1 3 B 1 4 A 1 5 B 1 6 B 1 7 C 1 8 C 1 9 C 1 10 C 1 11 A 1 12 A 1 13 B 1 14 B 1 15 C 1 16 B 1 17 B 1 18 D 1 19 D 1 20 A 1 21 A 1 22 A 1 23 A 1 24 B 1 25 B 1 26 A 1 27 C 1 28 A 1

0438/11 Cambridge IGCSE – Mark Scheme PUBLISHED October/November 2017 © UCLES 2017 Page 3 of 3 Question Answer Marks 29 D 1 30 B 1 31 A 1 32 B 1 33 B 1 34 C 1 35 D 1 36 D 1 37 C 1 38 D 1 39 D 1 40 A 1