Biology 7402: Cells Topical Past Paper Questions
AQA A Level Biology (7402) past-paper questions on Cells, free. This topic is frequently examined across 8 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Describe and explain how you would use cell fractionation and ultracentrifugation to obtain a sample of nuclei from muscle tissue. [6 marks] Describe the role of organelles in the production and release of enzymes by animal cells. Do not include details of transcription in your a…
Write an essay on one of the topics below. ## Either 1 The importance of interactions between organisms and their environment. [25 marks] ## Or 2 The importance of membranes in the functioning of cells. [25 marks]
A student prepared a stained squash of cells from the root tips of garlic to calculate a mitotic index. He: 1. cut the end 5 mm from 10 garlic roots 2. placed the root tips into a Petri dish containing $ 5 \, cm^{3} $ of hydrochloric acid for 12 minutes 3. rinsed the root tips in…
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