A-LevelBiologyBiodiversity and conservationMay/June 2013Paper 1 Q381 Mark
The diagram shows a simplified nitrogen cycle. [Figure 38.1] Which row shows the correct labels for P, Q, R and S?
Adenitrification by anaerobic bacteria nitrogen fixation by nitrifying bacteria decay of leaf tissue by saprotrophic bacteria ammonification by saprotrophic fungi
Blightning action on soil nitrates nitrogen fixation by nitrogen fixing bacteria decomposition using nitrogenase enzyme decomposition by root nodule bacteria
Cnitrification by anaerobic bacteria nitrification using nitrogenase enzyme decay of leaf tissue by saprotrophic fungi assimilation of organic nitrogen
Dreduction by anaerobic bacteria nitrogen fixation by root nodule bacteria decomposition of organic nitrogen decay of urea by saprotrophic bacteria
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of biodiversity and conservation within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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