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

Practise IB Biology SL B1.1.9 by explaining how condensation forms triglycerides and phospholipids from glycerol and fatty acids.

Exam points

Identify glycerol and fatty acids as the components combined to form a triglyceride.
Explain condensation formation of ester bonds when fatty acids join glycerol, with water released.
Distinguish triglycerides from phospholipids by their fatty-acid count and phosphate-containing group.

[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

(a)

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

[ 1 ]

(b)

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

[ 1 ]

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