A-LevelBiologyBiological moleculesMay/June 2020Paper 1 Q91 Mark

The diagram shows part of the chemical structure of a naturally occurring polysaccharide. [Figure 9.1] What types of glycosidic bonds are present?

Q: What is the correct answer to this A-Level Biology question?

The correct answer is C: β-1,3 and β-1,4.

Q: What topic does this question test?

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

Aα-1,3 and α-1,4

Bα-1,4 and α-1,6

Cβ-1,3 and β-1,4

Dβ-1,4 and β-1,6

✓ Correct Answer

The correct answer is C: β-1,3 and β-1,4

📋 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.

🔒

Unlock the Examiner's Analysis

Join thousands of Cambridge students already using Oracle Prep

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 2020 examination, Paper 1 Variant 2.

Practice on Oracle Prep

Oracle Prep provides AI-powered practice for all Cambridge O-Level and A-Level subjects. Our platform includes topic predictions with 87.7% accuracy, AI essay grading, and a comprehensive question bank spanning 25 years of past papers across 29 subjects.