CourseCourseConceptConceptDocsDocuments

Edexcel A-Level Biology AS 1.5 Triglycerides and Saturated or Unsaturated Lipids Questions

Count glycerol and fatty-acid components, name ester links and use carbon-carbon double bonds or the carbon-to-hydrogen ratio for a precise comparison.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Describe a triglyceride as glycerol joined to three fatty acids by ester bonds.
  • Compare saturated and unsaturated fatty acids through carbon-carbon double bonds.
  • Distinguish triglycerides from phospholipids using fatty acids and phosphate groups.

Edexcel A-Level Biology AS 1.5 Triglycerides and Saturated or Unsaturated Lipids Questions question 1

[Maximum number: 1]

The butterfly is an insect that feeds on nectar produced by flowers.
The photograph shows a butterfly feeding on a flower.

Figure for Question Edexcel A-Level Biology AS 1.5 Triglycerides and Saturated or Unsaturated Lipids Questions question 1 — Edexcel A-Level Biology AS

The nectar in flowers contains nutrients including sugars, amino acids and lipids.

Which row of the table describes a saturated lipid?
□ A
□ B
□ C
□ D

Table for Question Edexcel A-Level Biology AS 1.5 Triglycerides and Saturated or Unsaturated Lipids Questions question 1 — Edexcel A-Level Biology AS
All question bank results loaded