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1.1 Cell structure

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Question 77

A single-celled eukaryote absorbs mineral ions from its surroundings by active transport.

Scientists measured the mean number of mitochondria and the mean rate of mineral ion absorption in three populations of the organism. All three populations were kept under the same conditions.

PopulationMean number of mitochondria per cellMean rate of mineral ion absorption in pg per cell per hour
W80.80
X161.50
Y241.50

A scientist concluded that the number of mitochondria is the only factor affecting the rate of mineral ion absorption.

Evaluate the scientist's conclusion.

[4]
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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