Cambridge A Level Biology 9700 — 2010 Oct/Nov Paper 1 · Variant 3

This document consists of 17 printed pages and 3 blank pages. IB10 11_9700_13/RP © UCLES 2010 [Turn over *3821339057* UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level BIOLOGY 9700/13 Paper 1 Multiple Choice October/November 2010 1 hour 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, highlighters, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. 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.

2 © UCLES 2010 9700/13/O/N/10 1 The photomicrograph shows a transverse section through a leaf. ×50 1 sunken stomata 2 two layers of epithelium 3 thick cuticle 4 small surface area to volume Which features of a xerophytic leaf are visible in this section? A 1 and 2 B 1 and 3 C 2 and 4 D 1, 2, 3 and 4 2 What determines the rate of water movement from the roots to the leaves? A absorption of water through the root hair cells B development of a less negative water potential in the leaves C diffusion of water through the stomata D evaporation of water from the mesophyll cell walls 3 Which shows the correct structure of mature xylem vessel elements and phloem sieve tube elements? cytoplasm nucleus end wall A phloem xylem       key B phloem xylem       = present = absent C phloem xylem       D phloem xylem      

3 © UCLES 2010 9700/13/O/N/10 [Turn over 4 The diagram shows some adjacent cells from the root of a plant. Which is the apoplastic pathway of water movement? A B C D 5 Water is important to living organisms because it A acts as an excellent solvent for transport of dissolved glucose and urea. B becomes more dense in its solid form, ice, than its liquid state. C is used in condensation reactions to synthesise macromolecules. D requires a small increase in heat energy to raise its temperature. 6 The diagram shows the valves inside the heart. 1 2 3 4 Which valves are open or closed when the atria are relaxed and the ventricles contracted? valves open valves closed A 3 and 4 1 and 2 B 2 and 4 1 and 3 C 2 and 3 1 and 4 D 1 and 4 2 and 3

4 © UCLES 2010 9700/13/O/N/10 7 The mammalian circulatory system is described as a closed double circulation. The diagram shows the circulatory system in a different organism. The arrows show the direction of blood flow in the vessels. ventricle atrium lung gill How is the circulatory system in this organism described? A closed double B closed single C open double D open single 8 Which molecules, found in the cell surface membrane, have the properties listed? act as receptor sites for hormones form hydrogen bonds with water recognise antibodies A cholesterol and proteins phospholipids and cholesterol proteins and glycolipids B glycolipids and glycoproteins glycolipids and glycoproteins glycolipids and glycoproteins C phospholipids and cholesterol proteins and glycolipids cholesterol and proteins D proteins and glycolipids cholesterol and proteins phospholipids and cholesterol

5 © UCLES 2010 9700/13/O/N/10 [Turn over 9 The stalk of a dandelion is a hollow tube. Pieces of the stalk are cut as shown and placed in sucrose solutions of different water potentials. hollow centre of stalk thick walled outer cells thin walled inner cells cuts Which diagram shows the piece that is placed in the sucrose solution with the highest water potential? C D A B 10 In an investigation, four sucrose solutions were separated from each other by partially permeable membranes. 1 1.1 mol dm–3 2 0.8 mol dm–3 3 0.5 mol dm–3 4 0.1 mol dm–3 Which shows the direction in which water will move between the solutions? A from 1 and 2 to 3 and 4 B from 2 and 3 to 1 C from 1 to 3 D from 2 to 4

6 © UCLES 2010 9700/13/O/N/10 11 The equation shows a reversible reaction. sucrase sucrose + water glucose + fructose 1 2 In this reaction, on which molecule does an active site occur and what types of reaction occur at 1 and 2? active site present on reaction at 1 reaction at 2 A sucrase condensation hydrolysis B sucrase hydrolysis condensation C sucrose condensation hydrolysis D sucrose hydrolysis condensation 12 Tests on a liquid give these results. test observation Benedict’s red biuret lilac iodine in potassium iodide solution orange What are present in the liquid? A reducing sugar and protein B reducing sugar and starch C starch and protein D starch only 13 Which linkages are found between the glucose units in cellulose? A α 1–4 only B α 1–4 and α 1–6 C β 1–4 and α 1–6 D β 1–4 only

7 © UCLES 2010 9700/13/O/N/10 [Turn over 14 Which diagram shows the bond linking the individual units of both cellulose and amylose? C O P A O C C N H C O B C C O C O C C O C C D 15 Which statements about amylopectin and glycogen are correct? 1 both contain 1-4 glycosidic bonds 2 amylopectin contains β-glucose 3 glycogen contains more 1-6 branches than amylopectin A 1 only B 1 and 2 C 1 and 3 D 2 and 3 16 What are the features of triglycerides? polar less dense than water higher energy value than carbohydrates lower proportion of hydrogen than in carbohydrates A     key B     = yes C     = no D    

8 © UCLES 2010 9700/13/O/N/10 17 The photomicrograph shows human blood, with three types of white cell labelled. R S T Which row correctly identifies these white cells? cell R cell S cell T A lymphocyte lymphocyte phagocyte B lymphocyte phagocyte lymphocyte C phagocyte lymphocyte phagocyte D phagocyte phagocyte lymphocyte

9 © UCLES 2010 9700/13/O/N/10 [Turn over 18 The diagram shows part of the immune response. cell Q pathogen with chemical P on surface multiplication cell R with protein on surface to fit P What are P, Q and R? P Q R A antibody B-lymphocyte T helper cell B antibody T helper cell B-lymphocyte C antigen B-lymphocyte T helper cell D antigen T helper cell B-lymphocyte 19 Which diseases can be cured by the use of antibiotics? A cholera and tuberculosis B measles and smallpox C measles and tuberculosis D smallpox and cholera 20 What could cause an outbreak of malaria in a country where it had been eliminated? 1 mosquitoes became resistant to insecticides 2 migration of population due to war 3 malarial parasites became resistant to quinine A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

10 © UCLES 2010 9700/13/O/N/10 21 When a body cell is infected by a pathogen, which describes a correct immune response? A Killer T cells punch holes in infected cells, releasing antibodies. B Killer T cells release cytokines, infected body cells release antibodies. C Memory cells release antibodies, killer T cells secrete cytokines. D T helper cells release cytokines, plasma cells release antibodies. 22 Which of the cell organelles, when appropriately stained, will be clearly visible under the high power (×400) of the light microscope? lysosomes endoplasmic reticulum mitochondria chloroplasts A     key B     = visible C     = not visible D     23 The graticule and stage micrometer are used to measure cells. Which is the correct reason why the graticule calibrated? A The graticule can be used to make measurements. B The graticule is magnified by the objective lens. C The graticule magnifies the specimen. D The graticule makes comparisons.

11 © UCLES 2010 9700/13/O/N/10 [Turn over 24 The diagram shows a stage micrometer, with divisions 0.1 mm apart, viewed through an eyepiece containing a graticule. 0 10 20 30 40 50 60 70 80 90 100 The same eyepiece is now used to examine a blood smear. How many graticule divisions will cover the diameter of a white cell of 10 µm? A 1 B 4 C 10 D 20 25 What are the characteristics of a prokaryotic cell? DNA structure endoplasmic reticulum plasmids ribosomal size A circular absent present small B circular present absent large C linear absent present small D linear present absent large 26 Which is correct about the organelles listed in the table? carries out transcription contains enzymes contains ribosomes 1 lysosomes no yes no 2 mitochondria yes no yes 3 rough endoplasmic reticulum yes yes yes 4 vacuoles no yes no A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

12 © UCLES 2010 9700/13/O/N/10 27 The graph shows the course of an enzyme-catalysed reaction at 30 °C. concentration of product time X What is true at time X? A Most enzyme molecules will have free active sites. B The number of available substrate molecules is high. C The number of enzyme-substrate complexes is low. D The rate remains the same if more enzyme is added. 28 The rate of enzyme-catalysed reactions in human cells is regulated. Which may be involved in such regulation? 1 a change in enzyme concentration 2 a change in substrate concentration 3 inhibition by the final product of the reaction A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

13 © UCLES 2010 9700/13/O/N/10 [Turn over 29 The table shows the role of four different proteins involved in DNA replication. protein helicase topoisomerase single-strand binding protein DNA polymerase role unwinds the parental DNA double helix breaks and rejoins the DNA strands binds to separated DNA strands to stabilise them synthesises strand of DNA Which shows the function of these proteins? helicase topoisomerase single-strand binding protein DNA polymerase A adds DNA nucleotides to the 3’ end of a growing polynucleotide strand prevents original strands reforming complementary base pairs enables tension caused by unwinding to be released makes strands available as templates B enables tension caused by unwinding to be released prevents original strands reforming complementary base pairs makes strands available as templates adds DNA nucleotides to the 3’ end of a growing polynucleotide strand C enables tension caused by unwinding to be released makes strands available as templates adds DNA nucleotides to the 3’ end of a growing polynucleotide strand prevents original strands reforming complementary base pairs D makes strands available as templates enables tension caused by unwinding to be released prevents original strands reforming complementary base pairs adds DNA nucleotides to the 3’ end of a growing polynucleotide strand 30 Male bees are haploid. They develop from unfertilised eggs. Female bees are diploid. Which statements are correct? 1 All male bees are genetically identical. 2 Male bee sperm cells are produced by mitosis. 3 New combinations of genes only occur in female bees. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

14 © UCLES 2010 9700/13/O/N/10 31 Which statement describes the semi-conservative replication of DNA? A Parental DNA is broken down into nucleotides and reassembled with new nucleotides. B Parental DNA is split into triplets and new triplets are added. C Parental DNA is split into two strands, each of which is replicated. D Parental DNA remains intact and a new daughter DNA copy is built from new nucleotides. 32 What describes the behaviour of the nuclear envelope and the cell membrane during mitosis? nuclear envelope cell membrane A breaks down breaks down B breaks down remains intact C remains intact breaks down D remains intact remains intact 33 DNA was extracted from the salivary glands of a fruit fly and a human cheek cell. In which way did the DNA molecules differ? A in the ratio of adenine to thymine B in the sequence of the nucleotides C in the type of pentose sugar D in the types of nucleotide 34 The table shows the percentages of nitrogenous bases in four samples of nucleic acids. Which base is adenine? percentage of nitrogenous bases sample A B C D uracil 1 19 31 30 19 nil 2 27 23 24 26 nil 3 25 25 nil 25 25 4 17 32 33 18 nil

15 © UCLES 2010 9700/13/O/N/10 [Turn over 35 The diagram shows the volume of air breathed in and out while a person is breathing normally when at rest. They breathe out the deepest breath they can and then breathe in as much as they can before breathing normally again. 1 2 3 6 6 4 time lung volume Which points would you use to calculate the vital capacity? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4 36 Which tissues are present in the walls of a trachea and an alveolus? tissue cartilage epithelium with goblet cells smooth muscle A trachea alveolus       key B trachea alveolus       = present = absent C trachea alveolus       D trachea alveolus       37 How does nicotine in cigarette smoke increase the risk of cardiac disease? A by binding with haemoglobin B by constricting blood vessels C by inhibiting nerve transmission D by stimulating the pacemaker

16 © UCLES 2010 9700/13/O/N/10 38 The diagram represents the flow of energy through a tropical rainforest ecosystem. producers detritus decomposers Sun primary consumers secondary consumers W X respiration respiration respiration Z Y Which set of figures identifies the percentage transfer of energy between the Sun, producers, consumers and decomposers? W X Y Z A 1 10 20 80 B 1 20 10 80 C 10 20 1 10 D 10 10 1 20 39 A farmer grows a different crop in a field each year for three years. In the fourth year the farmer plants a leguminous crop and then ploughs this into the soil. The next year the rotation starts again. Which microorganisms will increase by the time the rotation starts again? 1 denitrifying bacteria 2 nitrifying bacteria 3 nitrogen-fixing bacteria 4 decomposing bacteria A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

17 © UCLES 2010 9700/13/O/N/10 40 The table shows the results of a field study of four species in a food chain in an area of woodland. species number of individuals biomass of one individual / arbitrary units energy value per unit mass / arbitrary units P 10 000 0.100 1.0 Q 5 10.000 2.0 R 500 0.002 1.8 S 3 300 000.000 0.5 Which is the correct pyramid of energy from these data? P R Q S Q R P S S Q P R S P Q R A B C D

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Subsidiary Level and GCE Advanced Level MARK SCHEME for the October/November 2010 question paper for the guidance of teachers 9700 BIOLOGY 9700/13 Paper 1 (Multiple Choice), maximum raw mark 40 Mark schemes must be read in conjunction with the question papers and the report on the examination. • CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the October/November 2010 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

Page 2 Mark Scheme: Teachers’ version Syllabus Paper GCE A/AS LEVEL – October/November 2010 9700 13 © UCLES 2010 Question Number Key Question Number Key 1 B 21 D 2 D 22 D 3 C 23 A 4 A 24 B 5 A 25 A 6 C 26 B 7 B 27 B 8 B 28 D 9 A 29 D 10 B 30 C 11 B 31 C 12 A 32 B 13 D 33 B 14 C 34 B 15 C 35 A 16 C 36 B 17 D 37 B 18 D 38 A 19 A 39 D 20 D 40 B