A-Level BiologyYear 2021Q2
4 2 Skulls can be used as evidence for human evolution. The only type of human present today is the modern human. In the past, another type of human, called Neanderthal, occupied the same geographical area. The photograph shows the skulls of both types of human. Modern human skull Neanderthal skull © hairymuseummatt/DrMikeBaxter Genetic studies now show that these two types of human have interbred. (a) Only small quantities of DNA can be extracted from the remains of Neanderthal humans. The quantity of extracted DNA is amplified using (1) A DNA profiling B polymerase chain reaction C RNA profiling D translation chain reaction Turn over 5 (b) Devise a procedure, using electrophoresis, to compare the amplified DNA from these two types of human. 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(c) Explain how the results of electrophoresis could provide evidence for interbreeding between the two types of human. 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(Total for Question 2 = 7 marks)
Paper Source:9BN0_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)
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