A-LevelBiologyBiological moleculesMay/June 2010Paper 1 Q31 Mark

Which feature of haemoglobin makes it a globular protein?

Q: What topic does this question test?

This question tests Biological molecules in A-Level Biology (syllabus code 9700). It is worth 1 mark.

AIt has four cross-linked polypeptide chains forming a quaternary structure.

BIt has hydrophobic groups on the inside and hydrophilic groups on the outside.

CIt has hydrophobic interactions and is insoluble in water.

DIt has polypeptide chains which are cross-linked to form sheets.

✓ Correct Answer

The correct answer is B: It has hydrophobic groups on the inside and hydrophilic groups on the outside.

📋 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 Biological molecules 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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