A-LevelBiologyThe mitotic cell cycleMay/June 2018Paper 1 Q351 Mark
What correctly describes the effect of carcinogens on lung tissue that causes a tumour to develop?
ACells in damaged alveoli walls divide more rapidly to replace damaged areas.
BCilia are paralysed and mucus accumulates in the lungs causing DNA to change.
CDNA changes, causing bronchial epithelial cells to divide by mitosis in an uncontrolled way.
DHaemoglobin carries less oxygen, causing bronchial cells to divide by mitosis in an uncontrolled way.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of the mitotic cell cycle 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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