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A-Level BiologyYear 2021Q1

2 Answer ALL questions. Write your answers in the spaces provided. 1 Plants can respond to and use light. The photograph shows a seedling starting to grow from a germinating seed. (a) Explain why the seedling needs a supply of magnesium ions. 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Turn over 3 (b) Describe the role of IAA (auxin) in the phototropic response of plants. (4) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (Total for Question 1 = 6 marks) 4 BLANK PAGE

Paper Source:9BN0_03_que_20211020.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)