Lipids and triglycerides

Beschreibung

Introduction to lipids, how to test for them and triglycerides.
HeatherTxo
Notiz von HeatherTxo, aktualisiert more than 1 year ago
HeatherTxo
Erstellt von HeatherTxo vor mehr als 10 Jahre
264
5

Zusammenfassung der Ressource

Seite 1

Lipids.

Lipids are fats made up of molecules of glycerol and fatty acids

These join together in a condensation reaction, creating a ester bond.

=

When 3 fatty acids are bonded to the glycerol molecule this makes a Triglyceride.

Fats are solid at room temperature Oils are liquid at room temperature Lipids are insoluble in water

Testing for lipids.

The test for lipids is known as the ethanol emulsion test.

Grind up sample in a pestle and mortar Add ethanol to create a solution and extract lipids. Filter with paper and a funnel into a test tube Add water to test tube Cloudy white emulsion will form if lipids are present

Triglycerides

Triglycerides are the most common lipids in nature. 

Triglycerides are formed when a glyceride molecule undergoes a condensation reaction with 3 fatty acids, in which water is also produced.

There are two types of fatty acids, unsaturated and saturated. Unsaturated contains and least one double bond where as saturated contains all single bonds.

Solid at room temperature due to closely packed parallel structure of fatty acids chains

Liquid at room temperature due to kinks in the structure so particles are more spaced out.

Triglycerides are stored in tissue called adipose tissue.

Triglyceride functions include: insulation protection of organs help give organs bouyancy

Introduction to lipids

Testing for lipids

Triglycerides

Zusammenfassung anzeigen Zusammenfassung ausblenden

ähnlicher Inhalt

Cell Transport
Elena Cade
Pathogens and Immunity
Elena Cade
AQA Biology 3.3 Structure of an epithelial cell
Charlotte Hewson
Biological Molecules Definitions
siobhan.quirk
Biology Unit 1a - GCSE - AQA
RosettaStoneDecoded
AS Biology Unit 1
lilli.atkin
B1.1.1 Diet and Exercise Flash Cards
Tom.Snow
Biology AQA 3.1.3 Cells
evie.daines
Biology AQA 3.2.5 Mitosis
evie.daines
Biology AQA 3.1.3 Osmosis and Diffusion
evie.daines
Biology- Genes, Chromosomes and DNA
Laura Perry