Cambridge A Level Biology 9700 — 2007 May/June Paper 1 · Variant 1

This document consists of 17 printed pages and 3 blank pages. IB07 06_9700_01/5RP © UCLES 2007 [Turn over *8585139293* UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level BIOLOGY 9700/01 Paper 1 Multiple Choice May/June 2007 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 2007 9700/01/M/J/07 1 The diameter of living cells varies considerably. Typical diameters are: a prokaryote, such as Streptococcus - 750 nm a eukaryotic cell, such as a white blood cell - 15 µm Given these measurements, the diameter of the white blood cell is how many times greater than the prokaryote? A x 2 B x 20 C x 50 D x 200 2 In constructing a plan diagram of a transverse section of a dicotyledonous leaf, which feature should not be included? A chloroplasts in the palisade mesophyll layer B cuticle on the upper epidermis C vascular bundles in the leaf lamina D xylem in the vascular bundles 3 Membranous sacs containing products of metabolism are formed by the endoplasmic reticulum in cells. Where are these products used? A inside and outside the cell B inside lysosomes only C inside the cell only D outside the cell only

3 © UCLES 2007 9700/01/M/J/07 [Turn over 4 The diagram shows a graduated slide, with divisions of 0.1 mm viewed using an eyepiece graticule. 0 10 20 30 40 50 60 70 80 90 100 Pollen grains were grown in a sugar solution and viewed using the eyepiece graticule. Diagram 1 shows the pollen grains at first and diagram 2 shows them after four hours. 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 at start after 4 hours diagram 1 diagram 2 What is the growth rate of the pollen tubes? A 5 µmh–1 B 10 µmh–1 C 5 mmh–1 D 10 mmh–1 5 In 1985, a giant bacterium, Epulopiscium fishelsoni, was discovered. Which cell structure(s) would be present in Epulopiscium enabling biologists to classify this organism as prokaryotic? A a cellulose cell wall outside the plasma membrane B a pair of centrioles close to the nuclear area C circular DNA lying free in the cytoplasm D smooth endoplasmic reticulum throughout the cytoplasm

4 © UCLES 2007 9700/01/M/J/07 6 This molecule is a polymer of reducing sugars. O O OH CH2OH OH O OH CH2OH OH HO O O OH CH2OH OH O O OH OH CH2OH OH Which of the following procedures could be carried out in order to test for the presence of the reducing sugars in this molecule? 1 add hydrolytic enzyme and then heat with Benedict’s reagent 2 dissolve in water, neutralise and then heat with Benedict’s reagent 3 boil with ethanol and then heat with Benedict’s reagent 4 boil with hydrochloric acid, neutralise and then heat with Benedict’s reagent A 1 and 2 B 1 and 4 C 1, 2 and 4 D 1, 2, 3 and 4 7 Which correctly matches the functional and structural features of cellulose, collagen, glycogen and triglyceride? structure function fibrous molecule held together by hydrogen bonds branched chains A cellulose collagen support strengthening       B cellulose triglyceride support energy source       C collagen glycogen strengthening storage       D glycogen triglyceride storage energy source      

5 © UCLES 2007 9700/01/M/J/07 [Turn over 8 Which describes the structure of amylopectin? A a branched chain with 1,2 and 1,4 glycosidic bonds B a branched chain with 1,4 and 1,6 glycosidic bonds C an unbranched chain with only 1,4 glycosidic bonds D an unbranched chain with 1,4 and 1,6 glycosidic bonds 9 Which molecule is found in glycogen? C C C O C C H H H H H HO OH OH OH CH2OH C C C O C C H H H H H HO OH OH OH CH2OH C C C O C OH H H H OH H CH2OH CH2OH H C C C H H H OH OH OH H A B C D 10 High concentrations of urea break all bonds, except covalent bonds, in protein molecules. Which level of protein structure would remain unchanged when a protein is treated with urea? A primary B secondary C tertiary D quaternary

6 © UCLES 2007 9700/01/M/J/07 11 Which bonds are the last to break when an enzyme is heated? A disulphide B hydrogen C hydrophobic interactions D ionic 12 During the production of apple juice, enzymes are used to break down the components of the cell walls. Which carbohydrate will be produced by this hydrolysis? A amylose B cellulose C α glucose D β glucose 13 The rate of enzyme catalysed reactions in human cells is regulated. Which of the following 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 only B 3 only C 1 and 2 only D 1, 2 and 3

7 © UCLES 2007 9700/01/M/J/07 [Turn over 14 The diagrams show two kinds of molecules found in cell surface membranes. Which part affects the fluidity of the membrane? A D C B

8 © UCLES 2007 9700/01/M/J/07 15 The graphs show the rate of uptake of sugars by a culture of animal cells, under different conditions. 0 10 20 30 temperature / °C air bubbled through the culture 3-carbon sugar 6-carbon sugar rate of uptake 0 10 20 30 temperature / °C nitrogen gas bubbled through the culture 3-carbon sugar 6-carbon sugar rate of uptake 0 0 How are the sugars taken up by the cells when air is bubbled through the culture? 3-carbon sugar 6-carbon sugar A active transport active transport B active transport diffusion C diffusion active transport D diffusion diffusion 16 Which process allows the movement of molecules that are too large to pass in through a cell surface membrane? A active transport B endocytosis C exocytosis D facilitated diffusion

9 © UCLES 2007 9700/01/M/J/07 [Turn over 17 Which structure organises spindle formation during mitosis in animal cells? A centriole B centromere C nucleolus D nucleus 18 Which processes involve mitosis? A growth, reduction division and asexual reproduction B growth, repair and asexual reproduction C growth, repair and semi-conservative replication D repair, reduction division and asexual reproduction 19 The graph represents the changes in the quantity of DNA present in one nucleus at different stages in the life cycle. relative DNA content 4 2 1 time egg fertilisation X Which stage takes place at X? A interphase B metaphase C prophase D telophase

10 © UCLES 2007 9700/01/M/J/07 20 Which type of sugar and bonds are found in a DNA molecule? type of sugar bonds linking complementary bases A hexose hydrogen B hexose peptide C pentose hydrogen D pentose peptide 21 A length of double-stranded DNA contains 120 nucleotides and codes for polypeptide X. What is the maximum length of polypeptide X? A 20 amino acids B 40 amino acids C 60 amino acids D 120 amino acids 22 In a DNA molecule, the base sequence AGT codes for the amino acid serine. What is the base sequence of the anti-codon on the tRNA to which serine becomes attached? A AGU B GAU C TCA D UCA 23 What occurs in the apoplast and symplast pathways? water enters cell wall water enters cytoplasm through plasma membrane water enters vacuoles water moves from cell to cell through plasmodesmata water moves from cell to cell through intercellular spaces A apoplast apoplast apoplast symplast symplast B apoplast symplast symplast symplast apoplast C symplast apoplast apoplast apoplast symplast D symplast symplast symplast apoplast apoplast

11 © UCLES 2007 9700/01/M/J/07 [Turn over 24 In an animal cell, which process is dependent upon cell surface area and which process is dependent upon cell volume? cell surface area cell volume A carbon dioxide produced oxygen used B glucose absorbed hormones detected C hormones detected carbon dioxide produced D oxygen used glucose absorbed 25 The diagrams show transverse sections of parts of a plant. 1 2 3 4 5 6 root stem leaf In the cross sections, what do 1, 2, 3, 4, 5 and 6 represent? leaf stem root phloem xylem phloem xylem phloem xylem A 1 2 3 4 5 6 B 1 2 4 3 6 5 C 2 1 3 4 5 6 D 2 1 4 3 6 5

12 © UCLES 2007 9700/01/M/J/07 26 Land flooded by the sea is not suitable for growing plants long after the salty flood water has drained away. The diagram represents a transverse section through a part of the root of a plant. xylem cortex soil water Which values of water potential (kPa) in the xylem and soil water help to explain why the land flooded with salty water is unsuitable for growth of plants? xylem soil water A –700 kPa 0 kPa B –1800 kPa –700 kPa C 0 kPa –1800 kPa D –700 kPa –1800 kPa 27 In mammals, some carbon dioxide is transported by red blood cells in combination with haemoglobin. What is the product of this combination? A carbamino-haemoglobin B carbonic acid C carboxyhaemoglobin D haemoglobinic acid

13 © UCLES 2007 9700/01/M/J/07 [Turn over 28 A red blood cell, entering the right side of the heart, passes by or through the following structures. 1 atrioventricular valve 2 semilunar valve 3 right atrium 4 right ventricle 5 sinoatrial node In which order will the red blood cell pass the structures? A 3 → 1 → 4 → 5 → 2 B 3 → 5 → 1 → 2 → 4 C 5 → 3 → 1 → 4 → 2 D 5 → 3 → 2 → 4 → 1 29 What correctly describes the cause and effect of carcinogens on lung tissue? A Cells of the alveoli walls divide more rapidly than normal by reduction division causing a tumour to develop. B Cilia are paralysed, mucus accumulates in the lungs, causing DNA to change, reduction division and a tumour to develop. C DNA changes, causing bronchial epithelial cells to divide in an uncontrolled way by mitosis and a tumour to develop. D Haemoglobin carries less oxygen, causing bronchial cells to divide in an uncontrolled way by mitosis and a tumour to develop. 30 What is a correct description of part of the respiratory system? part of respiratory system cartilage present ciliated epithelium present goblet cells present smooth muscle present A alveolus     B bronchus     C bronchiole     D trachea    

14 © UCLES 2007 9700/01/M/J/07 31 Which statement describes the vital capacity of a human lung? A the additional volume of air that can be exhaled after breathing out normally B the additional volume of air that can be inhaled after breathing in normally C the volume of air inhaled and then exhaled during a single tidal breath D the volume of air that can be exhaled following a maximum inhalation 32 Which statement explains why people suffering from malaria and people suffering from tuberculosis can both live in northern Europe, but only tuberculosis can be passed on to other people there? A Anopheles mosquitoes only breed in sub-tropical and tropical areas. B Antibiotics can be used to cure people with tuberculosis. C Migrant workers can carry the diseases with them. D Tuberculosis bacteria cannot survive in sub-tropical and tropical areas. 33 The diagram shows the effects of the antibiotics streptomycin and penicillin on the bacterium Escherichia coli. P S S colonies of E. coli petri dish into which nutrient agar containing E. coli has been poured disc of filter paper soaked in a solution of streptomycin P disc of filter paper soaked in a solution of penicillin What can you deduce about the response of E. coli to the effects of the antibiotics? completely resistant not completely resistant A S and P – B S P C P S D – S and P

15 © UCLES 2007 9700/01/M/J/07 [Turn over 34 The diagram refers to properties of diseases. Which area of the diagram refers to properties that are common to both tuberculosis and cholera? bacterial infectious transmitted by water A D C B 35 What causes the measles vaccine to be less effective in children from less economically developed countries? A Their diet does not contain enough carbohydrate. B Their diet does not contain enough protein. C They are carriers of the disease. D They rapidly become reinfected. 36 What is the function of the plasma cells during an immune response? A to secrete antibodies B to engulf bacteria C to kill cells infected with viruses D to change into memory cells

16 © UCLES 2007 9700/01/M/J/07 37 The graph shows the amount of antibody produced in response to an antigen. concentration of antibodies in the blood first exposure to an antigen time in days 0 10 20 30 40 From the graph, which statement is correct? A It takes 25 days to achieve active immunity. B Memory cells for this antigen are present in the body within 20 days. C T helper cells are activated on day 12. D The second exposure to the antigen occurred on day 25. 38 What limits the number of trophic levels in a food chain? A biomass of the autotrophs B efficiency of energy conversion between levels C net productivity of the ecosystem D species diversity in the ecosystem

17 © UCLES 2007 9700/01/M/J/07 39 The following are definitions of three ecological terms. 1 all of the organisms and their environment 2 group of individuals of one species living in an area 3 all of the organisms living in a habitat What are the correct definitions of a community and a population? community population A 1 2 B 2 1 C 3 1 D 3 2 40 The diagram shows the circulation of nitrogen in nature. nitrogen in the air nitrate in soil nitrite in soil ammonium nitrate in fertiliser NH4 + in soil organic nitrogen in legumes 2 lightning NO plants animals 1 4 4 3 5 What is correct? denitrification nitrification nitrogen fixation A 1 4 5 B 2 5 4 C 3 2 1 D 1 4 3

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Subsidiary Level and GCE Advanced Level MARK SCHEME for the May/June 2007 question paper 9700 BIOLOGY 9700/01 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 May/June 2007 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

Page 2 Mark Scheme Syllabus Paper GCE A/AS LEVEL – May/June 2007 9700 01 © UCLES 2007 Question Number Key Question Number Key 1 B 21 A 2 A 22 A 3 A 23 B 4 A 24 C 5 C 25 C 6 B 26 D 7 B 27 A 8 B 28 C 9 B 29 C 10 A 30 B 11 A 31 D 12 D 32 A 13 D 33 C 14 B 34 A 15 C 35 B 16 B 36 A 17 A 37 B 18 B 38 B 19 D 39 D 20 C 40 D