Biological Molecules

Worked examples (5)

• 1Benedict's test on a reducing sugar (4 marks)
• 2Non-reducing sugar test (5 marks)
• 3Biuret test for proteins (4 marks)
• 4Using a colorimeter to quantify reducing sugar (7 marks)
• 5Emulsion test for lipids (3 marks)

Model answers (3)

• ✓Model answer — Practice question — synthesis across spec point 1.1
• ✓Model answer 2
• ✓Model answer 3

Worked examples (4)

• 1Condensation reaction to form maltose (4 marks)
• 2Amylose vs amylopectin (5 marks)
• 3Cellulose structure and function (6 marks)
• 4Triglyceride formation (4 marks)

Model answers (4)

• ✓Model answer — Practice question — synthesis across spec 1.2
• ✓Model answer 2
• ✓Model answer 3
• ✓Model answer 4

Worked examples (4)

• 1Peptide bond formation (4 marks)
• 2Four levels of protein structure (8 marks)
• 3Structure of haemoglobin (6 marks)
• 4Structure of collagen (7 marks)

Model answers (3)

• ✓Model answer — Practice question — synthesis 1.4
• ✓Model answer 2
• ✓Model answer 3

Worked examples (4)

• 1Water's polarity and hydrogen bonding (4 marks)
• 2Water as a solvent (5 marks)
• 3High specific heat capacity (4 marks)
• 4Cohesion and the transpiration stream (5 marks)

Model answers (3)

• ✓Model answer — Practice question — synthesis 1.5
• ✓Model answer 2
• ✓Model answer 3