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IB Biology SL B1.1.9 Formation of Triglycerides and Phospholipids Questions

Practise IB Biology SL B1.1.9 by comparing triglyceride and phospholipid structures, including three versus two fatty acids and the phosphate group.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how condensation links glycerol to three fatty acids via ester bonds, releasing water.
  • Distinguish triglycerides from phospholipids by their three versus two fatty acids and ionized phosphate group.

IB Biology SL B1.1.9 Formation of Triglycerides and Phospholipids Questions question 1

[Maximum number: 2]

The diagram shows the structure of a triglyceride.

Figure for Question IB Biology SL B1.1.9 Formation of Triglycerides and Phospholipids Questions 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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