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1.1 Cell structure

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Question 38

Seedlings of two varieties of maize, P and Q, were grown in the same mineral solution. The table shows measurements from their roots.

MeasurementVariety PVariety Q
Mean number of mitochondria per root hair cell150450
Concentration of mineral ion X in the solution in mmol per dm³0.500.50
Concentration of mineral ion X inside the root hair cells in mmol per dm³4.04.0
Mean uptake rate of mineral ion X in µmol per g of root per hour1.23.5

Explain the difference in the mean uptake rate of mineral ion X between variety P and variety Q.

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Markscheme

1.1 Cell structure Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structure

282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.

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