Oxford Cambridge and RSA A Level Biology B (Advancing Biology) H422/01 Fundamentals of biology

OCR 2023 A Level Biology B H422/01 paper June 2023 Biology B OCR 2023 Oxford Cambridge and RSA A Level Biology B (Advancing Biology) H422/01 Fundamentals of biology Please write clearly in black ink. Do not write in the barcodes. Centre number Candidate number First name(s) Last name Oxford Cambridge and RSA Wednesday 7 June 2023 – Afternoon A Level Biology B (Advancing Biology) H422/01 Fundamentals of biology Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 110. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 40 pages. ADVICE • Read each question carefully before you start your answer. © OCR 2023 [601/4720/9] DC (PQ/JG) 317925/7 OCR is an exempt Charity Turn over You can use: •a scientific or graphical calculator •a ruler (cm/mm) 2 © OCR 2023 Section A You should spend a maximum of 40 minutes on this section. Write your answer for each question in the box provided. 1 The image shows an erythrocyte after being placed in a solution. Which option explains the appearance of the erythrocyte? A The solution was distilled water. B The water potential of the solution is equal to the water potential of the cytoplasm of the erythrocyte. C The water potential of the solution was less negative than the cytoplasm of the erythrocyte. D The water potential of the solution was more negative than the cytoplasm of the erythrocyte. Your answer [1] 3 Turn over © OCR 2023 2 The diagram shows substance X being transported across a cell membrane. Substance X Which transport mechanism is being used to transport substance X? A Active transport B Endocytosis C Exocytosis D Facilitated diffusion Your answer [1] 3 Which option explains why mammals need a mass transport system? A Diffusion distances are too short to supply sufficient oxygen to cells. B They have a double circulatory system. C They have a large surface area to volume ratio. D They have high metabolic demands. Your answer [1] 2 1