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Download 2025 ACTUAL AQA GCSE BIOLOGY Higher Tier 8461/1H Paper 1H Question paper + mark scheme and more Exams Biology in PDF only on Docsity!
Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature | declare this is my own work. GCSE BIOLOGY Higher Tier Paper 1H Tuesday 13 May 2025 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: * aruler * ascientific calculator. Instructions e Use black ink or black ball-point pen. Pencil should only be used for drawing. Fill in the boxes at the top of this page. Answer all questions in the spaces provided. If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). ¢ Do all rough work in this book. Cross through any work you do not want to be marked. ¢ Inall calculations, show clearly how you work out your answer. Information * The maximum mark for this paper is 100. ¢ The marks for questions are shown in brackets. « You are expected to use a calculator where appropriate. « You are reminded of the need for good English and clear presentation in your answers. For Examiner's Use Question Mark Nlola}ajo|rn|a TOTAL N2584611H01 IBIG/Jun25/G4006E10 8461/1H 1 Do not write outside the Answer all questions in the spaces provided. box Measles is an infectious disease caused by a pathogen. [o[1|.[4] What type of pathogen causes measles? [1 mark] [o[1].[2| Give one way measles is spread from one person to another person. [1 mark] [o[1].[3| One symptom of measles is pain. In adults, aspirin can be used to treat the pain. Which plant did aspirin originate from? [1 mark] [o[1].[4] Give one other symptom of measles. Do not refer to pain in your answer. [1 mark] 02 IB/G/Jun25/8461/1H 2 Figure 1 shows information about the severity of measles infection in vaccinated and unvaccinated children. Figure 1 50+ 40 Percentage 30}~ (%) of 7 EEE children : ee 20 10+— annnes 0 Mild Severe Severity of measles infection [o[4|.[6] There were 240 children in the survey. Key (_] Vaccinated [J Unvaccinated Calculate how many unvaccinated children had a severe measles infection. Use Figure 1. [3 marks] Number of unvaccinated children = IMI IB/G/Jun25/8461/1H Do not write outside the box MINT It is recommended that all children are given a measles vaccination. Give evidence from Figure 1 to support the recommendation. Include data from Figure 1 in your answer. [2 marks] Turn over for the next question Turn over > IB/G/Jun25/8461/1H_ Do not write outside the box (o[2) [2] INIA Complete Figure 2. You should: e label the y-axis e add the scale for the y-axis plot the data for countries C, D, E, F and G from Table 1 ¢ draw a line of best fit. Countries A and B have been completed for you. Figure 2 xD 0 20 40 60 80 100 120 140 160 180 200 Mean sugar intake per person per day in grams Question 2 continues on the next page [4 marks] Turn over > IB/G/Jun25/8461/1H_ Do not write outside the box Do not write outside the Figure 3 shows information about the relationship between sugar intake and Bok tooth decay. Figure 3 Mean number of decayed teeth per person Mean sugar intake per person per day [0 | 2].[3] Name the type of graph shown in Figure 3. [1 mark] [o[2].[4] What relationship is shown between the two variables in Figure 3? [1 mark] Tick (v’) one box. Inversely proportional No correlation Positive correlation IMI IB/G/Jun25/8461/1H 8 10 Do not write outside the Sugars and starch are carbohydrates. box A student investigated the effect of temperature on the activity of amylase. For each temperature, the student: e mixed starch and amylase together ¢ added iodine solution after 5 minutes. The iodine solution was yellow-brown before it was added to the mixture. Table 2 shows the results. Table 2 Temperature in °C | Colour of iodine solution 10 blue-black 30 yellow-brown 60 blue-black 90 blue-black [0[2].[5] Explain the results at 30 °C and at 90 °C. INIA [4 marks] 30°C 90 °C IB/G/Jun25/8461/1H 10 11 Do not write outside the [o[2].[6| How could the student change the investigation to find a more precise temperature box that amylase works best at? [1 mark] Tick (Vv) one box. Test more temperatures between 10 °C and 30 °C. Test more temperatures between 10 °C and 60 °C. Test more temperatures between 30 °C and 60 °C. Test more temperatures between 30 °C and 90 °C. Protease enzymes are involved in protein digestion. Different types of protease enzyme are active in different organs of the digestive system. Complete Table 3 to identify the organ where each protease enzyme is active. [2 marks] Table 3 Protease enzyme | Optimum pH | Organ where enzyme is active Pepsin 2 Trypsin 8 14 Turn over for the next question Turn over >» 11 IBG/Jun25/8461/1H 11 13 Do not write outside the [o[3].[2| Why would a potato cube placed into distilled water increase in mass? box [1 mark] Tick (Vv) one box. The solution in the potato cells was less concentrated than the distilled water. The solution in the potato cells was more concentrated than the distilled water. The volume of water in the potato cells was greater than the volume of distilled water. The volume of water in the potato cells was less than the volume of distilled water. [o[3].[3| Active transport is another process used by potato cells. Give one way active transport is different from osmosis. [1 mark] Turn over for the next question Turn over >» 13 IBG/Jun25/8461/1H 13 14 Do not write outside the box There are no questions printed on this page DO NOT WRITE/ON THIS PAGE ANSWER IN THE SPACES PROVIDED I IB/G/Jun25/8461/1H 14 Table 4 shows the results. 16 Table 4 Temperature Time taken for pondweed to in °C release 10 bubbles in seconds 10 84 20 43 30 27 40 25 50 33 [o[4].[2| Calculate the rate of photosynthesis at 20 °C. Give your answer to 3 significant figures. INIA Give the unit. [4 marks] Rate (3 significant figures) = Unit = IB/G/Jun25/8461/1H Do not write outside the box 16 17 [o[4].[3] Explain the difference in the rate of photosynthesis at 40 °C compared with the rate of photosynthesis at 10 °C. [3 marks] [o[4].[4| Give two other factors that affect the rate of photosynthesis. Do not refer to temperature in your answer. [2 marks] [o[4].[5| Describe one way the method could be changed to obtain more accurate results for the rate of photosynthesis. [1 mark] Question 4 continues on the next page Turn over >» 17 IB/G/Jun25/8461/1H Do not write outside the box 17 19 This question is about the human circulatory system. [o[5].[4| Blood plasma transports blood cells around the body. Give one other function of blood plasma. Do not refer to oxygen in your answer. [1 mark] Question 5 continues on the next page 1 Turn over > IB/G/Jun25/8461/1H_ Do not write outside the box 19 20 Do not write outside the [o[5].[2] Figure 5 shows a red blood cell. ‘box Figure 5 Diameter = 6.3 cm The image of the red blood cell in Figure 5 is magnified 7200 times. Calculate the real diameter of the red blood cell. Give your answer in micrometres (um). [5 marks] Real diameter = yum 20 IB/G/Jun25/8461/1H 20 
