plumiExcretion and the liver: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 5.1.2.1 Excretion and the liver, 2016–2025, with mark schemes and examiner’s reports where available.
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All 13 questions on Excretion and the liver, as a list
- June 2024, Paper 1, Q10 (1 mark): The diagram shows part of a liver lobule. F E G H I Which statement about liver function is correct? A Blood flows from I towards G. B H carries blood arriving
- June 2024, Paper 1, Q11 (1 mark): The photomicrograph shows a stained section of liver tissue. J What is the structure labelled J? A Hepatic artery B Hepatic portal vein C Hepatic vein D Sinusoi
- June 2024, Paper 1, Q12 (1 mark): Which statement describes urea production in the liver? A Amino acids enter the ornithine cycle. B Ammonia and carbon dioxide combine to make urea in the Krebs
- June 2023, Paper 1, Q19(a) (2 marks): Which statements about excretion and homeostasis are true, and which are false? Tick (✓) one box in each row. Statement True False The liver, kidneys, lungs and
- November 2021, Paper 1, Q1 (1 mark): Which of the options is not a function of the liver? A production of urea in the ornithine cycle B removal of amino groups from amino acids C storage of excess
- November 2021, Paper 1, Q18(a)(i) (2 marks): Identify the structures labelled N and O in Fig. 18.1. N O [2]
- November 2021, Paper 1, Q18(a)(ii) (2 marks): The walls of the structure labelled M in Fig. 18.1 are lined with cells. Suggest and explain how these cells are adapted to carry out their function. [2]
- November 2020, Paper 3, Q6(c) (2 marks): When old red blood cells are broken down, each haem group is converted to a molecule called bilirubin. Bilirubin passes through the digestive system. Bilirubin
- June 2018, Paper 1, Q10 (1 mark): One treatment for thyroid cancer is radioactive iodine. The radioisotope I131 is used. The thyroid gland absorbs any iodine that enters the body, so the radioac
- June 2018, Paper 1, Q23(a) (3 marks): A student looked at slides of different tissues under a light microscope. The four viewed images are labelled W, X, Y and Z in Fig. 23.1, on the insert. Identif
- June 2017, Paper 1, Q12 (1 mark): The image below shows the structure of the nucleotide base guanine. O N NH N NH2 N H Bird droppings are known as guano because they contain a high proportion of
- June 2017, Paper 1, Q17(a)(i) (2 marks): Calculate the order of magnitude by which concentration of copeptin in the faeces is higher than the concentration of C-reactive protein in the saliva. Show you
- June 2017, Paper 1, Q17(a)(ii) (2 marks): Suggest why blood and faeces have the highest concentrations of C-reactive protein and copeptin. [2]
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