plumiBody plans, mitosis and apoptosis: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 6.1.1.3 Body plans, mitosis and apoptosis, 2016–2025, with mark schemes and examiner’s reports where available.
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Q16(c)
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All 14 questions on Body plans, mitosis and apoptosis, as a list
- June 2025, Paper 2, Q16(c) (6 marks): Microscopy can be used to examine the structure of stem cells. (c)* The development of body form begins in embryonic stem cells. Using examples, explain the imp
- June 2023, Paper 2, Q8 (1 mark): Homeobox genes control body plan in eukaryotes. Which of the statements about homeobox genes are correct? 1: they bind to transcription factors 2: they contain
- June 2023, Paper 3, Q6 (6 marks): 6* Homeobox genes, including Hox genes, code for transcription factors and regulate the expression of structural genes. Describe the general roles of homeobox g
- June 2022, Paper 2, Q22(a) (5 marks): Complete the following sentences about control of body plan using the most appropriate terms. Body plan is under genetic and control. Internal and external can
- June 2022, Paper 2, Q22(b) (1 mark): State the name of the type of gene responsible for controlling body plan in multicellular organisms. [1]
- November 2021, Paper 2, Q3 (1 mark): Which of the following processes is important in determining the overall body plan of an organism? A endocytosis B exocytosis C meiosis D mitosis Your answer [1
- November 2020, Paper 2, Q16(a) (5 marks): Complete the passage below using the most appropriate words from the list. development DNA domains analogous archaea homozygous kingdoms homeobox homologous ope
- November 2020, Paper 2, Q16(b)(i) (2 marks): the development of body plan. 1 2 [2]
- November 2020, Paper 2, Q16(b)(ii) (2 marks): There are some public concerns about the ethics of using mice in these investigations. Suggest two reasons why mice are chosen as a suitable species for investi
- June 2019, Paper 2, Q4 (1 mark): Hox genes contribute to the overall body plan of an animal. Which of the following rows correctly describes Hox genes? Base sequence Product Mutations varies be
- June 2019, Paper 2, Q5 (1 mark): Hox genes contain a homeobox sequence of 180 base pairs. Two species have a homeobox sequence of 180 base pairs where 1.7% of the base pairs are different. Whic
- June 2017, Paper 2, Q13 (1 mark): Below are three processes that occur within living organisms. 1 apoptosis 2 mitosis 3 meiosis Which of these processes is important in determining the body plan
- June 2017, Paper 2, Q19(b)(iv) (1 mark): One type of gene is known as a homeobox gene. The base sequences of homeobox genes in humans and chimpanzees are almost identical. What conclusions about the ev
- June 2017, Paper 3, Q3(a)(ii) (6 marks): Tigers, Panthera tigris, are predatory mammals. They have evolved striped patterns on their fur (as shown in Fig. 3.1a on the insert), which provide camouflage
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