A-Level BiologyYear 2021Q8
24 8 Infections caused by Chlamydia and human papillomavirus (HPV) are sexually transmitted. The HPV is a non-enveloped DNA virus. Chlamydia infection is caused by the bacterium, Chlamydia trachomatis. (a) Compare and contrast the structure of a bacterial cell with the structure of HPV. 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(b) Some people with HPV infections have no symptoms but others develop warts and some types of cancer. Over 99% of cervical cancers are caused by HPV. Girls in the UK are offered an HPV vaccine. (i) Explain how an HPV vaccine protects girls from developing cervical cancer. 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Turn over 25 Turn over (ii) Explain why the HPV vaccine will not protect girls from infection with Chlamydia. 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Explain the advantages of offering the HPV vaccine to boys, as well as girls, in schools. 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(Total for Question 8 = 15 marks)
Paper Source:9BI0_01_que_20211012.pdf
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Exam Specification Info
This question is part of the UK A-Level Biology syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectBiology
Official MarksVariable (2–6 marks)