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9.3 Material cycles and decomposition

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Question 13
F

Two identical plots contain soil with little nitrate. Plot P receives nitrate fertiliser. Plot Q receives the same volume of water without fertiliser. All other conditions are kept the same. Plants in P grow more than plants in Q.

Which explanation links the treatment to the result?

[1]
A

Nitrates supply carbon for glucose, allowing more photosynthesis.

B

Nitrates supply hydrogen for water, allowing more cell expansion.

C

Nitrates supply oxygen for respiration, allowing more energy release.

D

Nitrates supply nitrogen for amino acids, allowing more protein synthesis.

Markscheme

9.3 Material cycles and decomposition Questions

  1. GCSE
  2. /Biology
  3. /9.3 Material cycles and decomposition

44 exam-style questions on Edexcel GCSE Biology 9.3 Material cycles and decomposition, covering 9.3.1 Cycling of materials through ecosystems, 9.3.2 The carbon cycle, 9.3.3 The water cycle, 9.3.4 The nitrogen cycle, 9.3.5 Indicator species and pollution, 9.3.6 Decomposition in preservation and composting, and 9.3.7 Rate changes in decay of biological material. Each one has a worked solution and a mark scheme showing where the marks go.

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