plumiHow do organisms grow and develop?: OCR GCSE Combined Science B questions
Every OCR GCSE Combined Science B exam question on B4.3 How do organisms grow and develop?, 2018–2025, with its mark scheme and examiner’s report.
Paper
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Calculations
Q9(a)
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Q9(b)(i)
The whole paper ↗Q9(b)(ii)
The whole paper ↗Q1(a)
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Q1(b)(i)
The whole paper ↗Q1(b)(ii)
The whole paper ↗Q5(c)(i)
The whole paper ↗Q2(d)(i)
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Q2(d)(ii)
The whole paper ↗Q2(d)(iii)
The whole paper ↗Q9(a)
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Q9(d)
The whole paper ↗Q8(a)
The whole paper ↗Q8(b)(i)
The whole paper ↗Q8(b)(ii)
The whole paper ↗Q8(b)(iii)
The whole paper ↗Q8(c)
The whole paper ↗Q8(d)
The whole paper ↗Q5(a)(i)
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Q5(a)(ii)
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All 37 questions on How do organisms grow and develop?, as a list
- June 2025, Biology Paper 1 Foundation, Q9(a) (4 marks): Complete the table to show which type of cell division is described by each statement. Tick (✓) one box in each row. Statement Both types Meiosis only Mitosis o
- June 2025, Biology Paper 1 Foundation, Q9(b)(i) (1 mark): In which part of a cell do these changes occur? Tick (✓) one box. Cell membrane Cell wall Cytoplasm DNA [1]
- June 2025, Biology Paper 1 Foundation, Q9(b)(ii) (2 marks): Describe how the changes lead to a single cell forming a tumour. [2]
- June 2025, Biology Paper 5 Higher, Q1(a) (4 marks): Complete the table to show which type of cell division is described by each statement. Tick (✓) one box in each row. Statement Both types Meiosis only Mitosis o
- June 2025, Biology Paper 5 Higher, Q1(b)(i) (1 mark): In which part of a cell do these changes occur? Tick (✓) one box. Cell membrane Cell wall Cytoplasm DNA [1]
- June 2025, Biology Paper 5 Higher, Q1(b)(ii) (2 marks): Describe how the changes lead to a single cell forming a tumour. [2]
- June 2025, Biology Paper 5 Higher, Q5(c)(i) (2 marks): There are adult and embryonic stem cells. Describe the different functions of these stem cells. Adult Embryonic [2]
- June 2024, Biology Paper 1 Foundation, Q2(d)(i) (1 mark): Which part, A, B, C or D, should the microscope slide be placed on? Tick (v) one box. A C D [1]
- June 2024, Biology Paper 1 Foundation, Q2(d)(ii) (1 mark): Which part of the microscope, A, B, C or D, is used to focus the image? Tick (v) one box. A B D [1]
- June 2024, Biology Paper 1 Foundation, Q2(d)(iii) (2 marks): The image that the student sees is shown in Fig. 2.2. Fig. 2.2 Chromosomes The cells in Fig. 2.2 are at different stages in the cell cycle. Statements A to D de
- June 2023, Biology Paper 5 Higher, Q9(a) (2 marks): Complete the sentences to describe what all cancers in humans have in common. Use words from the list. amino acids genes human lipids meristem mitosis osmosis p
- June 2023, Biology Paper 5 Higher, Q9(d) (2 marks): When a person develops leukaemia they cannot make new red blood cells. Explain why the person’s existing healthy red blood cells cannot divide to make more. [2]
- June 2022, Biology Paper 1 Foundation, Q8(a) (4 marks): The cell cycle has two phases, interphase and mitosis. The table describes events in the cell cycle. Complete the table to show if each event occurs in interpha
- June 2022, Biology Paper 1 Foundation, Q8(b)(i) (1 mark): After meiosis, the number of chromosomes in the cordgrass sex cells is half the number in the adult cells. Why is this important? [1]
- June 2022, Biology Paper 1 Foundation, Q8(b)(ii) (1 mark): How many chromosomes will be in the Townsend’s cordgrass zygote? Put a ring around the correct answer. 28 35 56 63 70 [1]
- June 2022, Biology Paper 1 Foundation, Q8(b)(iii) (1 mark): The zygote will enter the cell cycle to form an adult Townsend’s cordgrass plant. How many chromosomes will each adult cell have? Put a ring around the correct
- June 2022, Biology Paper 1 Foundation, Q8(c) (1 mark): Plant roots contain unspecialised cells, and specialised cells such as root hair cells. Which statement explains how the unspecialised cells in a root become sp
- June 2022, Biology Paper 1 Foundation, Q8(d) (1 mark): Explain why it is important for plants to have specialised root hair cells rather than only unspecialised cells. [1]
- June 2022, Biology Paper 5 Higher, Q5(a)(i) (1 mark): Complete Fig. 5.1 by writing in the number of chromosomes that would be found in each sex cell. [1]
- June 2022, Biology Paper 5 Higher, Q5(a)(ii) (2 marks): Explain why Fig. 5.1 supports the idea that Townsend’s cordgrass is produced when small and smooth cordgrass are bred. [2]
- June 2022, Biology Paper 5 Higher, Q5(e)(i) (1 mark): What is the scientific name for cell A? Tick (v) one box. Egg Nucleus Sperm Zygote [1]
- June 2022, Biology Paper 5 Higher, Q5(e)(ii) (1 mark): Label an X on Fig. 5.2 to show where the process of differentiation occurs.
- June 2022, Biology Paper 5 Higher, Q5(e)(iii) (1 mark): Which cells in Fig. 5.2 will be genetically identical? Tick (V) one box. All of the cells. All of the cells except the two gametes. Cell A and the unspecialised
- June 2022, Combined Science Paper 8 Higher, Q3(a)(i) (3 marks): James counts 76 cells in the image. Calculate the percentage of cells undergoing mitosis in James’ image. Percentage = % [3]
- June 2022, Combined Science Paper 8 Higher, Q3(a)(ii) (1 mark): Suggest why James is looking at the cells in the root tips of the broad bean roots. [1]
- June 2022, Combined Science Paper 8 Higher, Q3(a)(iii) (3 marks): Mitosis is the process of producing new cells so the broad bean plant can grow. Draw one line from each word to its correct description about mitosis and growth
- November 2021, Biology Paper 1 Foundation, Q8(d)(i) (1 mark): Changes in cells can lead to uncontrolled growth and cell division causing disease. What name do we use to describe this type of disease? [1]
- November 2020, Biology Paper 1 Foundation, Q4(b)(iii) (1 mark): A cow has 60 chromosomes in each of its body cells. Egg cells are produced by meiosis of body cells. How many chromosomes are there in the egg cell of a cow? Ti
- November 2020, Biology Paper 5 Higher, Q3(b) (1 mark): Chromosomes cannot be seen using a light microscope if a specimen is too thick. Why should a thin layer of a specimen be placed on a microscope slide to see the
- November 2020, Biology Paper 5 Higher, Q3(c)(i) (1 mark): A microscope slide prepared with a specimen is placed on the stage of a light microscope. The first step is to locate the cells and focus the image. Which combi
- November 2020, Biology Paper 5 Higher, Q3(c)(ii) (1 mark): Which combination of objective lens and focus knob will allow the cells to be seen in the greatest detail? Tick (✓) one box. Objective lens Focus knob ×10 Coars
- November 2020, Biology Paper 5 Higher, Q9(d) (2 marks): Adult humans cannot regrow lost or damaged organs, but most plants can. Explain why most plants can regrow organs. [2]
- June 2019, Biology Paper 1 Foundation, Q2(a) (1 mark): How many of the 20 visible cells are in mitosis in Fig. 2.1? [1]
- June 2019, Biology Paper 1 Foundation, Q2(b)(iii) (1 mark): When making the slide Sarah added a coloured chemical called methylene blue. Explain why. [1]
- June 2019, Biology Paper 5 Higher, Q5(b) (2 marks): Only red blood cells can contain the protein haemoglobin. Explain why other specialised cells cannot produce haemoglobin. [2]
- June 2018, Biology Paper 1 Foundation, Q9(b) (5 marks): Gametes are made by cell division. A fertilised egg divides to make body cells using a different type of cell division. Complete the table describing the two ty
- June 2018, Biology Paper 5 Higher, Q1(b) (5 marks): Gametes are made by cell division. A fertilised egg divides to make body cells using a different type of cell division. Complete the table describing the two ty
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