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A-LevelBiologyImmunityMay/June 2010Paper 1 Q341 Mark

What is a difference between T-lymphocytes and B-lymphocytes in the immune system?

AT-lymphocytes: do not form plasma cells; B-lymphocytes: form plasma cells which secrete antibodies into the blood stream
BT-lymphocytes: do not stimulate macrophages to carry out phagocytosis; B-lymphocytes: stimulate macrophages to carry out phagocytosis
CT-lymphocytes: formed from cells in the thymus; B-lymphocytes: formed from bone marrow cells
DT-lymphocytes: produce memory cells; B-lymphocytes: do not produce memory cells

✓ Correct Answer

The correct answer is A: T-lymphocytes: do not form plasma cells; B-lymphocytes: form plasma cells which secrete antibodies into the blood stream

📋 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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This multiple-choice question tests Immunity in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology May/June 2010 examination, Paper 1 Variant 2.

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