Lipids (3.1.3) | AQA A-Level Biology - (7402) | KnowledgeSet

Lipids

Biology · A-Level · AQA · AQA A-Level Biology - (7402) · Specification point · 3.1.3 · Biological molecules

Next Steps

Read Notes

Read clear notes for this topic.

Exam Questions

Coming soon

Flashcards

Flip through flashcards to lock it in.

Lesson

Coming soon

Ask Sage

Get help from Sage on this topic.

3.1.3 Lipids

Content	Opportunities for skills development
$Triglycerides and phospholipids are two groups of lipid. Triglycerides are formed by the condensation of one molecule of glycerol and three molecules of fatty acid. A condensation reaction between glycerol and a fatty acid (RCOOH) forms an ester bond. The R-group of a fatty acid may be saturated or unsaturated. In phospholipids, one of the fatty acids of a triglyceride is substituted by a phosphate-containing group. The different properties of triglycerides and phospholipids related to their different structures. The emulsion test for lipids. Students should be able to: recognise, from diagrams, saturated and unsaturated fatty acids explain the different properties of triglycerides and phospholipids.$	$AT f Students could use, and interpret the results of, the emulsion test for lipids.$

Content

Opportunities for skills development

Triglycerides and phospholipids are two groups of lipid. Triglycerides are formed by the condensation of one molecule of glycerol and three molecules of fatty acid. A condensation reaction between glycerol and a fatty acid (RCOOH) forms an ester bond. The R-group of a fatty acid may be saturated or unsaturated. In phospholipids, one of the fatty acids of a triglyceride is substituted by a phosphate-containing group. The different properties of triglycerides and phospholipids related to their different structures. The emulsion test for lipids. Students should be able to: recognise, from diagrams, saturated and unsaturated fatty acids explain the different properties of triglycerides and phospholipids.

AT f Students could use, and interpret the results of, the emulsion test for lipids.