A Level Biology B H422/02 Question Paper 2021

Friday 15 October 2021 – Morning A Level Biology B (Advancing Biology) H422/02 Scientific literacy in biology Time allowed: 2 hours 15 minutes INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for gr ...

Friday 15 October 2021 – Morning A Level Biology B (Advancing Biology) H422/02 Scientific literacy in 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 100. • 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 28 pages. ADVICE • Read each question carefully before you start your answer. *H42202* *8959153958* © OCR 2021 [601/4720/9] DC (CJ/FC) 300220/3 You must have: • a clean copy of the Advance Notice Article (inside this document) You can use: • a ruler (cm/mm) • a scientific or graphical calculator Friday 15 October 2021 – Morning A Level Biology B (Advancing Biology) H422/02 Scientific literacy in biology Time allowed: 2 hours 15 minutes 2 © OCR 2021 Answer all the questions. 1 This question is based on the Advance Notice article ‘Do Pathogens Gain Virulence as Hosts Become More Resistant?’ on the Insert. (a) The myxoma virus (MYXV) is a pathogen that causes myxomatosis in its hosts. (i) Describe how a virus replicates. ........................................................................................................................................... ........................................................................................................................................... .............................................................................................................