Supplying the cell: OCR GCSE Biology A questions

Every OCR GCSE Biology A exam question on B2.1 Supplying the cell, 2018–2025, with its mark scheme and examiner’s report.

All 136 questions on Supplying the cell, as a list

June 2025, Paper 1 Foundation, Q17(e) (2 marks): Substances can move into and out of cells. Give two processes that can move substances into or out of cells. 1 2 [2]
June 2025, Paper 1 Foundation, Q21(b) (2 marks): Explain how the production of sugars in the algae allows the algae to take up water. [2]
June 2025, Paper 1 Foundation, Q24(a) (1 mark): The student prepares a slide to look for mitosis in the different parts of the root. The student adds a stain when preparing the slide. Explain why the student
June 2025, Paper 1 Foundation, Q24(b) (4 marks): The student uses a light microscope to look at the garlic root cells on the prepared slide. Describe how the student would set up the microscope so that the det
June 2025, Paper 1 Foundation, Q24(c) (2 marks): The student takes two measurements when observing the cells under the microscope: • the total number of cells in the field of view • the number of cells in the
June 2025, Paper 1 Foundation, Q24(d) (1 mark): The student concludes that only cells found in certain parts of the root can divide by mitosis. How does the data in the table support their conclusion? [1]
June 2025, Paper 1 Foundation, Q24(e) (2 marks): The student wants to improve their experiment to: • make a more accurate conclusion about where cells in the root can divide by mitosis • check that their resul
June 2025, Paper 2 Foundation, Q17(b)(ii) (2 marks): In 2023, a patient with SIOD received stem cell treatment before a transplant. Six weeks before their transplant, the patient received stem cells from the kidne
June 2025, Paper 3 Higher, Q3 (1 mark): The concentration of mineral ions in soil varies. What describes how mineral ions move from soil into the root hair cells of a plant? A By active transport and
June 2025, Paper 3 Higher, Q7 (1 mark): If the tail of an earthworm is cut and removed, the earthworm will live and grow new tail segments. From which type of cells would the earthworm tissues grow? A
June 2025, Paper 3 Higher, Q11 (1 mark): In which cell in the image will DNA replication be occurring? Cell A Cell B Cell D Cell C Your answer [1]
June 2025, Paper 3 Higher, Q12 (1 mark): Visking tubing is an artificial partially permeable membrane. A student: • puts starch solution into a visking tubing bag connected to capillary tubing • puts t
June 2025, Paper 3 Higher, Q17(a) (1 mark): The student prepares a slide to look for mitosis in the different parts of the root. The student adds a stain when preparing the slide. Explain why the student
June 2025, Paper 3 Higher, Q17(b) (4 marks): The student uses a light microscope to look at the garlic root cells on the prepared slide. Describe how the student would set up the microscope so that the det
June 2025, Paper 3 Higher, Q17(c) (2 marks): The student takes two measurements when observing the cells under the microscope: • the total number of cells in the field of view • the number of cells in the
June 2025, Paper 3 Higher, Q17(d) (1 mark): The student concludes that only cells found in certain parts of the root can divide by mitosis. How does the data in the table support their conclusion? [1]
June 2025, Paper 3 Higher, Q17(e) (2 marks): The student wants to improve their experiment to: • make a more accurate conclusion about where cells in the root can divide by mitosis • check that their resul
June 2025, Paper 4 Higher, Q19(c)(iii) (2 marks): The first person to receive stem cell treatment for SIOD was in 2023. This person received stem cells from a donor. These stem cells reached the bone marrow and
June 2025, Paper 4 Higher, Q23(c)(ii) (2 marks): The organism that the scientists plan to use is a virus. The virus produces an enzyme that breaks down the bacterial cell wall. Explain why this may cause the b
June 2024, Paper 1 Foundation, Q18(c) (2 marks): As a chick develops, it makes new cells. These are the stages of the cell cycle. They are not in the correct order. A Movement of the chromosomes B Cell divisio
June 2024, Paper 1 Foundation, Q22(a) (3 marks): The student wants to calculate the percentage change in mass for each beetroot cube. They want to use the method above to collect the data they need, but have m
June 2024, Paper 1 Foundation, Q22(b) (2 marks): State two variables that the student should control in this investigation. 1 2 [2]
June 2024, Paper 1 Foundation, Q22(c) (3 marks): Describe how the student could find out if their data is both repeatable and reproducible. Repeatable Reproducible [3]
June 2024, Paper 1 Foundation, Q22(d) (2 marks): Two of the beetroot cubes increased in mass. Explain why some of the beetroot cubes will increase in mass. [2]
June 2024, Paper 1 Foundation, Q23(a)(i) (1 mark): What type of stem cell will the scientists have used? [1]
June 2024, Paper 1 Foundation, Q23(a)(ii) (1 mark): Why will the scientists have used this type of stem cell? Tick (3) one box. Can differentiate into any type of cell Can differentiate into some types of cells E
June 2024, Paper 1 Foundation, Q23(b)(i) (3 marks): One of the scientists claims ‘this research shows that our method will cure people who have a similar hearing problem’. State three reasons why this scientist’s
June 2024, Paper 1 Foundation, Q23(b)(ii) (1 mark): Suggest one way the scientists could extend their research. [1]
June 2024, Paper 1 Foundation, Q23(c) (2 marks): The scientists discover that a different technique could one day be used to successfully treat 15% of the 10 million people who have hearing loss. Calculate how
June 2024, Paper 2 Foundation, Q8 (1 mark): Using stem cells to treat disease is a new technique in medicine. What is an ethical issue with this process? A Embryos may be destroyed in the process. B It is
June 2024, Paper 3 Higher, Q8 (1 mark): What is the correct sequence of events in one cell cycle? A Growth of the cell, DNA replication, movement of the chromosomes B Growth of the cell, movement of t
June 2024, Paper 3 Higher, Q16(a) (3 marks): The student wants to calculate the percentage change in mass for each beetroot cube. They want to use the method above to collect the data they need, but have m
June 2024, Paper 3 Higher, Q16(b) (2 marks): State two variables that the student should control in this investigation. 1 2 [2]
June 2024, Paper 3 Higher, Q16(c) (3 marks): Describe how the student could find out if their data is both repeatable and reproducible. Repeatable Reproducible [3]
June 2024, Paper 3 Higher, Q16(d) (2 marks): Two of the beetroot cubes increased in mass. Explain why some of the beetroot cubes will increase in mass. [2]
June 2024, Paper 3 Higher, Q17(a)(i) (1 mark): What type of stem cell will the scientists have used? [1]
June 2024, Paper 3 Higher, Q17(a)(ii) (1 mark): Why will the scientists have used this type of stem cell? Tick (✓) one box. Can differentiate into any type of cell Can differentiate into some types of cells E
June 2024, Paper 3 Higher, Q17(b)(i) (3 marks): One of the scientists claims ‘this research shows that our method will cure people who have a similar hearing problem’. State three reasons why this scientist’s
June 2024, Paper 3 Higher, Q17(b)(ii) (1 mark): Suggest one way the scientists could extend their research. [1]
June 2024, Paper 3 Higher, Q17(c) (2 marks): The scientists discover that a different technique could one day be used to successfully treat 15% of the 10 million people who have hearing loss. Calculate how
June 2024, Paper 3 Higher, Q18(b) (3 marks): The substances transported around the organism enter cells either by active transport, diffusion or osmosis. For each substance indicate which method of transpo
June 2024, Paper 3 Higher, Q20(b) (2 marks): Plant hormones are also responsible for controlling the growth of stems. Describe how cells are produced to allow stems to grow. [2]
June 2024, Paper 4 Higher, Q22(d) (2 marks): Scientists are trying to develop treatments for Huntington’s using stem cells to replace cells damaged by the protein. Describe two risks of using stem cells to
June 2023, Paper 1 Foundation, Q13 (1 mark): What is the percentage change in mass of the potato chip during an experiment? Mass of potato chip before (g) Mass of potato chip after (g) 5.7 5.2 A – 0.5 % B
June 2023, Paper 1 Foundation, Q17(b)(i) (2 marks): Stem cells are found in human embryos. Describe what happens to stem cells as the embryo develops into a baby. [2]
June 2023, Paper 1 Foundation, Q17(b)(ii) (3 marks): It takes one cell 12 hours to divide to produce two cells. Starting with one cell, calculate how many cells there will be after 2 days. Number of cells = [3]
June 2023, Paper 3 Higher, Q3 (1 mark): In an osmosis experiment, a student measures out 45 cm3 of a solution. 3 They use a beaker to measure out the volume. Which piece of equipment would make this m
June 2023, Paper 3 Higher, Q5 (1 mark): How are mineral ions absorbed by plant roots? A By active transport B By diffusion C By osmosis D By translocation Your answer [1]
June 2023, Paper 3 Higher, Q9 (1 mark): A cell divides by mitosis every 20 minutes. How many cells will there be after 3 hours? A 9 B 18 C 60 D 512 Your answer [1]
June 2023, Paper 3 Higher, Q10 (1 mark): A drug is used to treat cancer. The drug stops the formation of microtubules that move chromosomes in cells. Which statement explains how the drug stops more ca
June 2023, Paper 3 Higher, Q19(a) (1 mark): Why did the student remove the skin from the aubergine before placing it in the sugar solution? [1]
June 2023, Paper 3 Higher, Q19(b) (3 marks): Calculate the percentage change in mass for the piece of aubergine placed in 0.8mol / dm3. Give your answer to 3 significant figures. Percentage change in mass
June 2023, Paper 3 Higher, Q19(c) (1 mark): The student plots a graph to work out the solute concentration of the cells in the aubergine. 40.0 30.0 20.0 Change in mass 10.0 (%) 0.0 0.0 0.2 0.4 0.6 0.8 –10
June 2023, Paper 3 Higher, Q19(d) (2 marks): Describe how you could improve the method to determine the concentration of the cells in the aubergine with greater accuracy. [2]
June 2023, Paper 3 Higher, Q19(e) (1 mark): Another student evaluates the method used in the experiment. This student finds that two errors were made. For each error, decide if it is a random error or a s
June 2023, Paper 3 Higher, Q24(c) (2 marks): Beta thalassaemia can be treated with stem cells. Stem cells are taken from a donor and placed in the vein of the patient. Explain why using stem cells from a d
June 2023, Paper 4 Higher, Q13 (1 mark): Scientists are using stem cells to try and cure cystic fibrosis. They are trying two methods: 1) using stem cells from cloned embryos 2) converting skin cells f
June 2023, Paper 4 Higher, Q19(d) (2 marks): Mole rats rarely develop cancer. One theory to explain this involves two ‘over-crowding’ genes. These genes slow down the cell cycle when cells come into contac
June 2022, Paper 1 Foundation, Q5 (1 mark): When one cell divides by mitosis, how many new cells are produced? A 1 B 2 C 4 D 8 Your answer [1]
June 2022, Paper 1 Foundation, Q10 (1 mark): Visking tubing is made of a selectively permeable membrane. A visking tubing bag containing starch solution is placed in a beaker of water. Visking tubing bag S
June 2022, Paper 1 Foundation, Q16(a) (4 marks): Complete each sentence to describe what they do next. Use words from the list. coverslip eyepiece focus light objective stage stain water To make the chromosome
June 2022, Paper 1 Foundation, Q16(b)(i) (1 mark): Identify one cell in the image that shows the chromosomes starting to move apart. Draw an arrow to this cell on the image. Label the arrow A. [1]
June 2022, Paper 1 Foundation, Q16(b)(ii) (1 mark): Draw a second arrow to identify one nucleus in the image. Label this arrow N. [1]
June 2022, Paper 1 Foundation, Q16(c) (1 mark): Give one reason why the tissue for the sample was taken from root tips. [1]
June 2022, Paper 1 Foundation, Q20(c) (1 mark): A condition called dry eye can be caused by damage to the corneal cells in the eye. • Dry eye can now be treated using stem cells. • The stem cells are taken fr
June 2022, Paper 2 Foundation, Q16(e) (3 marks): Heart disease causes damage as muscle cells can be replaced with scar tissue. This makes the heart less efficient at pumping blood, which affects all the cells
June 2022, Paper 3 Higher, Q5 (1 mark): Water moves into root hair cells due to differences in water potentials. Which term describes this process? A Active transport B Diffusion C Osmosis D Transloca
June 2022, Paper 3 Higher, Q7 (1 mark): An elephant has 56 chromosomes in a stomach cell. How many chromosomes will there be in an elephant’s ear cell? A 23 B 28 C 56 D 112 Your answer [1]
June 2022, Paper 3 Higher, Q13 (1 mark): The graph shows how the DNA content of a cell changes during the cell cycle. C B A DNA D content Time Which part of the graph A, B, C or D represents DNA replic
June 2022, Paper 3 Higher, Q14 (1 mark): The cell cycle consists of the following stages: 1. Cell growth 2. Movement of chromosomes 3. DNA replication Which is the correct order of the stages in one ce
June 2022, Paper 3 Higher, Q24(a) (6 marks): Fig. 24.1 shows how stem cells in bone marrow differentiate into red blood cells. Fig. 24.2 shows how the concentration of RNA and haemoglobin changes as the st
June 2022, Paper 4 Higher, Q19(c) (2 marks): One treatment that doctors use for amyloidosis involves: • Killing all the plasma cells in the body. • Then giving the patient healthy stem cells. Explain how t
November 2021, Paper 1 Foundation, Q5 (1 mark): The diagram shows a capillary inside liver tissue. Liver cell Capillary wall Red blood cell What does the arrow represent? A Carbon dioxide diffusing into a liv
November 2021, Paper 1 Foundation, Q12 (1 mark): Look at the diagrams modelling transport of molecules into and out of cells. Start of experiment End of experiment Membrane Starch suspension Starch suspension
November 2021, Paper 1 Foundation, Q18(a)(i) (2 marks): Fig. 18.1 shows the cell cycle. The letters represent different stages. G2 M S G1 Fig. 18.1 Complete the table to identify the stages from the description of wh
November 2021, Paper 1 Foundation, Q18(b)(i) (2 marks): Cell differentiation occurs during growth in multicellular organisms. Explain why cell differentiation is important. [2]
November 2021, Paper 1 Foundation, Q18(b)(ii) (1 mark): Stem cells are found in embryonic and adult tissue in animals. Where are stem cells found in plants? Put a ring around the correct answer. meristem phloem stoma
November 2021, Paper 1 Foundation, Q19(c)(i) (2 marks): Explain how changes in blood sugar levels caused by diabetes affect the water potential of the blood. [2]
November 2021, Paper 1 Foundation, Q19(c)(ii) (2 marks): Explain how surrounding cells will be affected by these changes in water potential in the blood. [2]
November 2021, Paper 1 Foundation, Q21(b)(i) (2 marks): Embryo stem cells can be used to treat a wider range of disorders than menstrual blood stem cells. Explain why. [2]
November 2021, Paper 1 Foundation, Q21(b)(ii) (2 marks): The time it takes for a population to double in size is called the doubling time. For menstrual blood stem cells, doubling time is 19.4 hours. Starting with 1 s
November 2021, Paper 1 Foundation, Q21(b)(iii) (1 mark): The doubling time for umbilical cord stem cells is 48 hours. How many times faster is the growth of menstrual blood stem cells? [1]
November 2021, Paper 1 Foundation, Q21(b)(iv) (2 marks): Discuss why scientists think menstrual blood stem cell extraction is a positive development. [2]
November 2021, Paper 2 Foundation, Q2 (1 mark): What are stem cells? A Any cells in the skin. B Cells that can form any type of cell. C Cells that do not have a nucleus. D Cells with half the normal number of
November 2021, Paper 3 Higher, Q16(b)(i) (2 marks): Embryo stem cells can be used to treat a wider range of disorders than menstrual blood stem cells. Explain why. [2]
November 2021, Paper 3 Higher, Q16(b)(ii) (2 marks): The time it takes for a population to double in size is called the doubling time. For menstrual blood stem cells, doubling time is 19.4 hours. Starting with 1 s
November 2021, Paper 3 Higher, Q16(b)(iii) (1 mark): The doubling time for umbilical cord stem cells is 48 hours. How many times faster is the growth of menstrual blood stem cells? [1]
November 2021, Paper 3 Higher, Q16(b)(iv) (2 marks): Discuss why scientists think menstrual blood stem cell extraction is a positive development. [2]
November 2021, Paper 3 Higher, Q22(a)(i) (2 marks): Fig. 22.1 shows the cell cycle. The letters represent different stages. G2 M S G1 Fig. 22.1 Which processes happen during stage S and stage M? Write your answer
November 2021, Paper 3 Higher, Q22(a)(ii) (1 mark): Cells can become specialised. Give one reason why this is important for organisms. [1]
November 2020, Paper 1 Foundation, Q1 (1 mark): What is meant by the term cell differentiation? A Cells become organs B Cells become organ systems C Cells become specialised D Cells become tissues Your answer
November 2020, Paper 1 Foundation, Q5 (1 mark): Which type of cell can divide to produce a range of different cell types? A Heart cell B Neurone cell C Sperm cell D Stem cell Your answer [1]
November 2020, Paper 1 Foundation, Q10 (1 mark): A student models the process of mitosis using cookies and sprinkles. Mitosis is part of the cell cycle. Which part of the cell cycle has the student modelled? A
November 2020, Paper 1 Foundation, Q21(c) (3 marks): Red blood cells burst when they are placed in a solution with a much higher water potential than the red blood cells. This is called lysis. Explain why lysis ha
November 2020, Paper 2 Foundation, Q17(b) (1 mark): Treatment for cancer often involves powerful medicines that stop cells dividing all over the body. Write down the name of the type of cell division that occurs
November 2020, Paper 3 Higher, Q4 (1 mark): A student models the process of mitosis using cookies and sprinkles. Mitosis is part of the cell cycle. Which process in the cell cycle has the student modelled
November 2020, Paper 3 Higher, Q9 (1 mark): Arsenic is a toxin that stops respiration in cells. What other cell process would be stopped because of arsenic? A Active transport B Diffusion C Osmosis D Tran
November 2020, Paper 3 Higher, Q11 (1 mark): In people with multiple sclerosis their immune cells stop working as they should. HSCT is a treatment for multiple sclerosis which destroys all the immune cells
November 2020, Paper 3 Higher, Q16(c) (3 marks): Red blood cells burst when they are placed in a solution with a much higher water potential than the red blood cells. This is called lysis. Explain why lysis ha
June 2019, Paper 1 Foundation, Q3 (1 mark): The diagram shows the direction of oxygen transfer from red blood cells to body cells. What process does the arrow show? body cells capillary wall red blood cel
June 2019, Paper 1 Foundation, Q8 (1 mark): During which phase of the cell cycle does mitosis happen? A Cell division D B Further Cell growth cell growth C DNA replication Your answer [1]
June 2019, Paper 1 Foundation, Q13 (1 mark): A cube of potato is used to investigate the effect of surface area on osmosis. The cube is 3 × 3 × 3 cm. What is the surface area to volume ratio of the cube? A
June 2019, Paper 1 Foundation, Q14 (1 mark): An experiment is carried out to find the concentration of potato tissue. Four chips are cut from a potato. At the start, each chip is 50 mm long, 10 mm wide and
June 2019, Paper 1 Foundation, Q18(a)(i) (1 mark): Suggest why the scientist uses a scalpel rather than a kitchen knife. [1]
June 2019, Paper 1 Foundation, Q18(a)(ii) (1 mark): Write down one safety precaution that the scientist should take when using a scalpel. [1]
June 2019, Paper 1 Foundation, Q18(a)(iii) (2 marks): The explants are then prepared for cloning by placing on an agar jelly plate. Agar jelly contains water, sugars and minerals. Agar jelly plate When the explants
June 2019, Paper 1 Foundation, Q18(b)(i) (2 marks): Explain why this will help the explants grow and develop into clones. [2]
June 2019, Paper 1 Foundation, Q18(b)(ii) (2 marks): Using a heated cabinet with light bulbs inside the cabinet would improve this method. Explain why. [2]
June 2019, Paper 1 Foundation, Q18(b)(iii) (1 mark): The scientist examines the agar jelly plate regularly. Growth of the explants is visible in the plate within 10 days and parts of the explants are turning green
June 2019, Paper 1 Foundation, Q18(c) (3 marks): The mass of the explants at the start was 15 g. After 10 days the mass of the explants was 28 g. Calculate the percentage increase in mass of the explants. Give
June 2019, Paper 1 Foundation, Q18(d) (2 marks): The cells in cauliflower explants behave the same way as embryonic stem cells do in animals. Explain why it is more difficult to clone adult animals than to clo
June 2019, Paper 1 Foundation, Q19(d) (3 marks): The lining of the uterus is shed during menstruation. New cells are needed to replace the lining of the uterus. Describe the processes that occur to make these
June 2019, Paper 2 Foundation, Q4 (1 mark): Why are stem cells useful for repairing damaged tissues? A They are easily obtained from any organ. B They are not attacked by pathogens such as bacteria. C The
June 2019, Paper 3 Higher, Q1 (1 mark): An experiment is carried out to find the concentration of potato tissue. Four chips are cut from a potato. At the start, each chip is 50 mm long, 10 mm wide and
June 2019, Paper 3 Higher, Q18(a) (3 marks): An experiment is set up to investigate how substances move into and out of cells. Look at the results. Start of experiment End of experiment membrane starch sus
June 2019, Paper 3 Higher, Q18(b) (6 marks): Sodium ions help regulate the balance of water between the blood and body cells. In some people the level of sodium ions in the blood can become very low. This
June 2019, Paper 3 Higher, Q18(c)(i) (1 mark): Draw a curve of best-fit on the graph. [1]
June 2019, Paper 3 Higher, Q18(c)(ii) (1 mark): Use the graph to estimate the concentration of sucrose that has the same water potential as the potato cells. Concentration = mol / dm3 [1]
June 2019, Paper 3 Higher, Q18(c)(iii) (1 mark): In a different experiment a sucrose concentration of 0.0 mol / dm3 increases the mass of a carrot chip by 30%. The carrot chip shows a 10% decrease in mass comp
June 2019, Paper 3 Higher, Q18(d) (1 mark): Osmotic conditions can increase the size of plant tissue but stem cells are responsible for growth of new cells. What name is given to plant tissue that contain
June 2019, Paper 3 Higher, Q19(e) (2 marks): Scientists are using human embryonic stem cells to grow cells to treat type 1 diabetes. Explain why scientists use embryonic rather than adult stem cells. [2]
June 2019, Paper 3 Higher, Q20(a) (1 mark): What equipment should be used to measure the mass of the explants to 1 hundredth of a gram? [1]
June 2019, Paper 3 Higher, Q20(b)(ii) (2 marks): The experiment could be improved by placing the agar jelly plate with explants into a heated cabinet containing light bulbs. Describe how this cabinet could be
June 2019, Paper 3 Higher, Q22(b)(ii) (1 mark): Which part of the cell cycle takes place in PCR? [1]
June 2019, Paper 4 Higher, Q22(a) (1 mark): When the tide comes in the salt marsh gets covered with seawater. Explain the effects of salt water on plant cells. [1]
June 2018, Paper 1 Foundation, Q2 (1 mark): Look at the diagram. It shows the particles dissolved in two solutions. Permeable membrane Particles Solution X Solution Y The particles can diffuse through the
June 2018, Paper 1 Foundation, Q12 (1 mark): Why do plant root hair cells use active transport to take in minerals? A Minerals are dissolved in water in the soil. B Minerals are needed by the plant in very
June 2018, Paper 1 Foundation, Q13 (1 mark): Which one of these stages comes first during mitosis? A The nuclear membrane forms. B The nuclear membrane breaks down. C Chromosomes separate. D Chromosomes li
June 2018, Paper 2 Foundation, Q20(d)(i) (2 marks): Scientists want to use stem cells as a treatment for this condition. Why might stem cells be able to repair the retina? [2]
June 2018, Paper 3 Higher, Q1 (1 mark): Look at some of the stages in mitosis. 1 The nuclear membrane forms. 2 The nuclear membrane breaks down. 3 Chromosomes separate. 4 Chromosomes line up on the eq
June 2018, Paper 3 Higher, Q5 (1 mark): A plant cell is placed in a solution with a higher solute concentration than the cell contents. What will happen to the plant cell? A Absorb water until it burs
June 2018, Paper 3 Higher, Q14 (1 mark): Which is a function of carrier proteins in a cell membrane? A Transfer impulses across a synapse B Transfer molecules by active transport C Transport amino acid
June 2018, Paper 3 Higher, Q19(c)(i) (1 mark): Motor neurone disease (MND) is a condition that affects reaction times. MND affects the speed of nerve impulse in motor neurones. Stem cells taken from the skin
June 2018, Paper 3 Higher, Q21(d)(ii) (2 marks): Explain why guard cells are an example of specialised cells. [2]
June 2018, Paper 4 Higher, Q18(c)(i) (2 marks): Explain why stem cells could be used as a treatment for this condition. [2]
June 2018, Paper 4 Higher, Q18(c)(ii) (1 mark): Why is it an advantage to use stem cells from the patient rather than from another person? [1]

Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every OCR GCSE Biology A paper.

Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.

1,636 questions