GCSE BIOLOGY Higher Tier Paper 1H. Predictor Questions and answers. Rated A+

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Answer all questions in the spaces provided. 0 1 A student prepared some animal cells to view using a microscope. Figure 1 shows the student preparing the cells. Figure 1 0 1 . 1 Name two pieces o... f laboratory equipment the student could have used to prepare cells to view using a microscope. [2 marks] 1 23 *03* Turn over ► IB/M/Jun21/8461/1H Do not write outside the Figure 2 shows the student’s light microscope. box Figure 2 0 1 . 2 Name part A. [1 mark] 0 1 . 3 What is the function of part B? [1 mark] 0 1 . 4 The student tried to look at the cells using the microscope. Suggest one reason why the student could not see any cells when looking through part A. [1 mark] Question 1 continues on the next page4 *04* IB/M/Jun21/8461/1H Do not write outside the box 13 0 1 . 5 Red blood cells are specialised animal cells. Compare the structure of a red blood cell with the structure of a plant cell. [6 marks] 0 1 . 6 When placed into a beaker of water: • a red blood cell bursts • a plant cell does not burst. Explain why the red blood cell bursts but the plant cell does not burst. [2 marks]5 *05* Turn over ► IB/M/Jun21/8461/1H Do not write outside the 0 2 A student investigated the effectiveness of three different antibiotics. box Figure 3 shows how the student set up an agar plate. Figure 3 The student used aseptic techniques to make sure that only one type of bacterium was growing on the agar. 0 2 . 1 Describe two aseptic techniques the student should have used. [2 marks] 1 2 Question 2 continues on the next page6 *06* IB/M/Jun21/8461/1H Do not write outside the The student placed the agar plate in an incubator at 25 °C for 48 hours. box Figure 4 shows the agar plate after 48 hours. Figure 4 0 2 . 2 Which antibiotic is the least effective? Give a reason for your answer. [1 mark] Least effective antibiotic Reason7 *07* Turn over ► IB/M/Jun21/8461/1H Do not write outside the box 9 0 2 . 3 Calculate the area where no bacteria were growing for antibiotic C. Use ?? = 3.14 Give the unit. [5 marks] Area = Unit 0 2 . 4 Suggest one way the student could improve the investigation. [1 mark] Turn over for the next question8 *08* IB/M/Jun21/8461/1H Do not write outside the 0 3 Body Mass Index (BMI) is a way of finding out if a person’s body mass falls within a box healthy range for their height. Table 1 shows information about two people. Table 1 Person Body mass in kg Height in m BMI in kg/m2 A 63 1.65 23.1 B 92 1.71 X Figure 5 shows five BMI categories for ad [Show More]

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