Cambridge International Examinations Cambridge International General Certificate of Secondary Education

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1 * * ambridge International Examinations ambridge International General ertificate of Secondary Education IOLOGY 0610/21 Paper 2 Multiple hoice (Extended) October/November 2018 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or H is recommended) 45 minutes RE THESE INSTRUTIONS FIRST Write in soft pencil. o not use staples, paper clips, glue or correction fluid. Write your name, entre number and candidate number on the nswer Sheet in the spaces provided unless this has been done for you. O NOT WRITE IN NY ROES. There are forty questions on this paper. nswer all questions. For each question there are four possible answers,, and. hoose the one you consider correct and record your choice in soft pencil on the separate nswer Sheet. Read the instructions on the nswer Sheet very carefully. Each correct answer will score one mark. mark will not be deducted for a wrong answer. ny rough working should be done in this booklet. Electronic calculators may be used. This syllabus is approved for use in England, Wales and Northern Ireland as a ambridge International Level 1/Level 2 ertificate. This document consists of 18 printed pages and 2 blank pages. I18 11_0610_21/3RP ULES 2018 [Turn over

2 2 1 The sundew is a carnivorous plant that can trap small insects with sticky hairs and then digest them. When an insect gets stuck, other nearby sticky hairs bend over to trap the insect. Which characteristics of living organisms are demonstrated when the sundew traps insects? growth and excretion growth and sensitivity movement and excretion movement and sensitivity 2 Systems of classification show which organisms share more recent ancestors. What is the most accurate system of classification? using anatomy using N base sequences using morphology using a pedigree diagram 3 Which part of a plant cell controls the movement of substances into and out of the cell? cell membrane cell wall cytoplasm vacuole ULES /21/O/N/18

3 4 The diagram shows part of a leaf in cross-section. 3 X Structures X and Y are both part of the same Y cell. organ. tissue. vessel. 5 How do carbon dioxide and oxygen move into and out of a mesophyll cell? active transport diffusion respiration transpiration ULES /21/O/N/18 [Turn over

4 4 6 Four freshly cut potato cylinders were soaked for one hour in different salt solutions before being pinned to cork blocks. Two of the blocks are shown. pin rigid potato cylinder flaccid potato cylinder cork block Which solution would cause the potato cylinder to be most flaccid? 0.1 mol per dm 3 salt solution 0.3 mol per dm 3 salt solution 0.7 mol per dm 3 salt solution 1.0 mol per dm 3 salt solution 7 The data show the concentrations of sugar and starch in an onion. total sugar including reducing sugar / g per 100g starch / g per 100g The onion is tested with enedict s solution and iodine solution. Which set of results is correct? enedict s solution iodine solution blue blue-black blue brown brick red blue-black brick red brown 8 Which statement about the structure of N is correct? ase always pairs with base. ase always pairs with base T. It consists of proteins. It forms a single helix. ULES /21/O/N/18

5 9 The apparatus shown is used for an experiment on starch digestion. Which test-tube contains the most sugar after 20 minutes? 5 starch solution and salivary amylase starch solution starch solution and salivary amylase water-bath at 15 water-bath at student wrote some notes about enzymes. She wrote: The of the enzyme is to an area on the substrate. This area on the substrate can fit into it to form an complex. Which words correctly complete gaps 1, 2 and 3? active site complementary enzyme-substrate active site similar enzyme-product shape complementary enzyme-product shape similar enzyme-substrate ULES /21/O/N/18 [Turn over

6 11 n experiment was carried out using the apparatus shown. 6 The carbon dioxide content of the water in each test-tube was measured at the start and again three hours later. In which test-tube would there be a decrease in carbon dioxide content? water water plant water snail black polythene to keep out light light light light 12 The diagram shows a plant cell. cell membrane vacuole nucleus cell wall chloroplast cytoplasm Which type of cell is shown? cuticle cell epidermal cell palisade mesophyll cell spongy mesophyll cell 13 What is the result of a diet lacking iron? bleeding gums poor wound healing reduced number of red blood cells weak bones and teeth ULES /21/O/N/18

7 14 The diagram shows part of the alimentary canal. Which structure produces lipase? 15 The photomicrograph shows a cross-section through a buttercup root.

7 7 14 The diagram shows part of the alimentary canal. Which structure produces lipase? 15 The photomicrograph shows a cross-section through a buttercup root. Z What is the function of the tissue labelled Z? site of photosynthesis site of respiration transport of sugars transport of water ULES /21/O/N/18 [Turn over

8 8 16 Roots and leaves both act as a source and a sink for sucrose and amino acids at different times during the year. t which point in the year are the roots most active as a source? spring new leaves start to grow winter no leaves are present summer leaves are mature autumn leaves die and fall 17 The diagram shows a circulatory system. 2 3 capillaries of the lungs heart capillaries of the rest of the body 1 4 Which vessels carry oxygenated blood? 1 and 2 1 and 4 2 and 3 2 and 4 18 What happens to the heart valves when the ventricles contract? atrioventricular valves semilunar valves valves close valves close valves close valves open valves open valves close valves open valves open ULES /21/O/N/18

9 9 19 The diagram with the structure labelled X shows a bacterium with proteins on its surface. The diagram labelled Y shows proteins made by the human body. X Which row shows the correct combination for destroying the bacterium? Y name of X name of Y correct shape of Y antigen antibody antibody antigen antigen antibody antibody antigen ULES /21/O/N/18 [Turn over

10 10 20 The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30 seconds. volume of air in lungs / dm time / s 30 Which graph shows changes in the volume of air in the lungs of the same person immediately after they have done five minutes of vigorous exercise? volume of air in lungs / dm volume of air in lungs / dm time / s time / s 2 2 volume volume of air in of air in lungs 1 lungs 1 / dm 3 / dm time / s 0 30 time / s 21 What is produced by anaerobic respiration in mammals? alcohol + carbon dioxide alcohol + oxygen lactic acid + carbon dioxide lactic acid ULES /21/O/N/18

11 22 Which row describes the functions of the bladder, kidneys and liver? 11 production of urea excretion of urea storage of urine liver bladder kidneys bladder kidneys liver liver kidneys bladder kidneys liver bladder 23 The diagram shows the structure of the eye. Which structure refracts light? ULES /21/O/N/18 [Turn over

12 24 student used two seedlings X and Y to investigate phototropism. The diagram shows their investigation. 12 piece of glass light piece of glass light X at the start of the experiment X after some time no curvature towards light light piece of glass light piece of glass Y at the start of the experiment Y after some time gives curvature towards light Which statement explains the difference in results between X and Y? The piece of glass destroyed the auxin on the shaded side of the seedling. The piece of glass destroyed the auxin on the side of the seedling facing the light. The piece of glass in X stopped the auxin travelling down the shaded side of the seedling. The piece of glass in X stopped the auxin travelling down the side of the seedling facing the light. ULES /21/O/N/18

13 25 The diagram shows part of the mechanism that controls blood sugar concentration. 13 liver 1 more glucose 3 more glycogen 2 less glucose 4 less glycogen blood vessels blood vessels 5 more glucagon 6 less glucagon pancreas person does one hour of exercise. Starting with the pancreas, what is the sequence of events in which the hormone glucagon is involved? The graph shows the number of cases of MRS in one country between 2001 and number of cases of MRS year etween which years was the greatest change in the number of cases of MRS seen? 2002 and and and and 2006 ULES /21/O/N/18 [Turn over

14 14 27 Which row describes sexual reproduction? gamete nucleus zygote nucleus genetically different offspring produced diploid diploid diploid haploid haploid diploid haploid haploid 28 Which statement describes human male gametes? large, few and non-motile large, numerous and motile small, few and non-motile small, numerous and motile 29 Which organ secretes the most progesterone during pregnancy? adrenal gland ovary placenta uterus 30 What is the role of mrn? assembles amino acids into protein molecules carries a copy of the gene out of the nucleus controls cell function by controlling the production of proteins duplicates chromosomes before mitosis ULES /21/O/N/18

15 15 31 The diagram shows the formation of new diploid cells. X Y What do arrows X and Y represent? X Y duplication of chromosomes meiosis duplication of chromosomes mitosis meiosis duplication of chromosomes mitosis duplication of chromosomes 32 man marries a woman who has a different blood group from him. They have two children. The children have different blood groups from each other and different blood groups from their parents. What are the genotypes of the parent s blood groups? I I and I I I I and I o I o I I and I I I I and I o I o 33 Sickle-cell anaemia is a genetic disease that is caused by the allele Hb S. Hb is the normal allele. woman does not have the symptoms of the disease but her brother does show symptoms. If her mother and father do not have symptoms, which statement is correct? The woman has the genotype Hb S Hb S. The woman s brother has the genotype Hb Hb. The woman s father and mother both have the genotype Hb Hb S. The woman s father and mother both have the genotype Hb S Hb S. ULES /21/O/N/18 [Turn over

16 16 34 Over the last 30 years some antibiotics have become less effective in treating bacterial infection. What is the reason for this? artificial selection asexual reproduction more effective new antibiotics natural selection 35 The diagram shows part of the nitrogen cycle. nitrogen in atmosphere animals plants W Z nitrate ions Y ammonium ions X Which row correctly identifies the bacteria involved in processes W, X, Y and Z? W X Y Z denitrifying decomposer nitrifying nitrogen-fixing denitrifying nitrifying decomposer nitrogen-fixing nitrifying decomposer nitrogen-fixing denitrifying nitrogen-fixing nitrifying decomposer denitrifying ULES /21/O/N/18

17 36 The graph shows a bacteria population curve. 17 In which phase on the graph is the number of bacteria dying equal to the number dividing? number of bacteria 0 0 time / min 37 acteria are used in genetic engineering and biotechnology. acteria are used because of the presence of which cell structure? cell membrane cell wall cytoplasm plasmids 38 What is an example of genetic engineering? using enzymes to make washing powders using pectinase to make fruit juice producing plants that have been given genes for resistance to insect pests using yeast to make bread 39 What is least likely to result from deforestation? increase in flooding increase in species loss of habitats loss of soil ULES /21/O/N/18 [Turn over

18 18 40 Pieces of plastic between 1 µm and 1 mm in size are called microplastics. Microplastics are put into some face creams and are produced during clothing manufacture. They can now be found in increasing quantities in oceans all over the world. s well as their small size, which other property of microplastics make them dangerous to living organisms? They are lightweight. They are non-biodegradable. They are non-reactive. They are toxic. ULES /21/O/N/18

19 19 LNK PGE ULES /21/O/N/18

20 20 LNK PGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (ULES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the ambridge International Examinations opyright cknowledgements ooklet. This is produced for each series of examinations and is freely available to download at after the live examination series. ambridge International Examinations is part of the ambridge ssessment Group. ambridge ssessment is the brand name of University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. ULES /21/O/N/18

Cambridge International Examinations Cambridge International General Certificate of Secondary Education

Cambridge International Examinations Cambridge International General Certificate of Secondary Education *3265335475* ambridge International Examinations ambridge International General ertificate of Secondary Education IOLOGY 61/22 Paper 2 Multiple hoice (Extended) February/March 218 dditional Materials: