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The exam focuses on DNA structure and base pairing, respiration (aerobic and anaerobic), electron microscopy, blood vessel adaptations, mitosis outcomes, amino acid roles in proteins, photosynthesis and outliers, diabetes and glucose testing, osmosis in selectively permeable tubing, sickle cell anaemia explanations, auxin distribution effects, enzyme active sites, reaction types for photosynthesis versus respiration, and potometer experimental design.","Oxford Cambridge and RSA  \nTuesday 17 May 2022 – Morning GCSE (9–1) Biology A (Gateway Science) J247/01 Paper 1 (Foundation Tier)  \nTime allowed: 1 hour 45 minutes  \nF  \nYou must have:  \n• a ruler (cm/mm)  \nYou can use:  \n• a scientific or graphical calculator  \n• an HB pencil  \n| Please write clearly in black ink. Do not write in the barcodes. |  |  |  |\n| --- | --- | --- | --- |\n| Centre number |  | Candidate number |  |\n| First name(s)  \u003Cbr>Last name   |  |  |  |\n\nINSTRUCTIONS  \n• Use black ink. You can use an HB pencil, but only for graphs and diagrams.  \n• Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown.  \n• Answer all the questions.  \n• Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong.  \nINFORMATION  \n• The total mark for this paper is 90.  \n• The marks for each question are shown in brackets [ ] .  \n• Quality of extended response will be assessed in questions marked with an asterisk (*) .  \n• This document has 28 pages.  \nADVICE  \n• Read each question carefully before you start your answer.  \n© OCR 2022 [601/8589/2] DC (MB/FC) 300354/7  \nOCR is an exempt Charity  \nTurn over  \n2  \nSECTION A  \nAnswer all the questions.  \nYou should spend a maximum of 30 minutes on this section.  \nWrite your answer to each question in the box provided.  \n1 What does one DNA nucleotide consist of? A A phosphate and sugar backbone B A sugar, a phosphate and a base C Four bases, A, C, T and G  \nD Two different sugars and a base  \nYour answer  [1]  \n2 Which molecule is produced in both aerobic and anaerobic respiration in animals?  \nA ATP  \nB Glucose  \nC Lactic acid  \nD Oxygen  \nYour answer  [1]  \n3 What do electron microscopes have that allow scientists to see cells in greater detail?  \nA A high magnification and a high resolution  \nB A high magnification and a low resolution  \nC A low magnification and a high resolution  \nD A low magnification and a low resolution  \nYour answer  [1]  \n3  \n4 Which blood vessels have valves along their length?  \nA Arteries and capillaries  \nB Arteries, veins and capillaries  \nC Capillaries  \nD Veins  \nYour answer  [1]  \n5 When one cell divides by mitosis, how many new cells are produced?  \nA 1  \nB 2  \nC 4  \nD 8  \nYour answer  [1]  \n6 What word describes the amino acids that join to make a protein molecule?  \nA Enzymes  \nB Monomers  \nC Nucleotides  \nD Polymers  \nYour answer  [1]  \n© OCR 2022 Turn over  \n4  \n7 A student investigates the effect of light intensity on the rate of photosynthesis.  \nThey count the number of gas bubbles released by a plant under water.  \nThe table shows their results.  \n\n| Light intensity | Number of gas bubbles |  |  |\n| --- | --- | --- | --- |\n|  | Repeat 1 | Repeat 2 | Repeat 3 |\n| Low | 6 | 7 | 8 |\n| Medium | 10 | 10 | 11 |\n| High | 13 | 19 | 14 |\n\nWhich number could be classed as anomalous (an outlier)?  \nA 6  \nB 8  \nC 11  \nD 19  \nYour answer  [1]  \n8 DNA consists of two strands.  \nThis is the base sequence found in one strand:  \nATT  \nWhich is the complementary base sequence of the second strand?  \nA ATT  \nB CAG  \nC CGG  \nD TAA  \nYour answer  \n[1]  \n5  \n9 One symptom of diabetes is glucose in the urine.  \nWhich biochemical test is used to confirm the presence of glucose in the urine?  \nA Benedict’s  \nB Biuret  \nC Ethanol (emulsion)  \nD Iodine  \nYour answer  [1]  \n10 Visking tubing is made of a selectively permeable membrane.  \nA visking tubing bag containing starch solution is placed in a beaker of water.  \nVisking tubing bag  \nStarch solution  \nBeaker Water  \nWhat will happen?  \nA Nothing will happen.  \nB Starch will leave the visking tubing bag. C Water will enter the visking tubing bag. D Water will leave the visking tubing bag.  \nYour answer  \n[1]  \n© OCR 2022 Turn over  \n6  \n11 The diagram shows a red blood cell from a person who has sickle cell anaemia. This","cbCaiftxb2tF8d58","https://ap.wps.com/l/cbCaiftxb2tF8d58","pdf",4104126,1,28,"English","en",105,"# SECTION A: Answer all the questions\n## 1 - 15\n# SECTION B: Answer all the questions\n## 16","[{\"question\":\"What is the total mark for this paper, and how is it allocated?\",\"answer\":\"The total mark for the paper is 90. Marks for each question are shown in brackets [ ].\"},{\"question\":\"Which tools are students allowed to use?\",\"answer\":\"Students must use black ink and may use an HB pencil only for graphs and diagrams. 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