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IB Biology SL B1.1.9 Triglycerides and Phospholipids Question Bank

Practise IB Biology SL B1.1.9 by explaining how glycerol and fatty acids form triglycerides and how lipid structure supports energy storage.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how glycerol and fatty acids join by condensation to form triglycerides and phospholipids.
  • Relate triglyceride structure and hydrophobic properties to long-term energy storage.

B1.1.9—Formation of triglycerides and phospholipids question 1

[Maximum number: 2]

The diagram shows the structure of a triglyceride.

Figure for Question B1.1.9—Formation of triglycerides and phospholipids question 1 — IB Biology SL

Question (a)

(a)

Identify the type of reaction used to form the covalent bond indicated by X .

[ 1 ]

Question (b)

(b)

Identify the molecule that was used to form part Y of the triglyceride.

[ 1 ]
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