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Fats & Lipids

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Yusuf Islam

on 23 November 2014

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Transcript of Fats & Lipids

Fats are solid at room temperature

Fats are made up of Carbon, Hydrogen and Oxygen

Fats are made up of two types of organic chemicals, fatty acids and glycerol



Fats
There are saturated and unsaturated fats

Saturated- Each carbon atom is joined to the one next to it by one single covalent bond (Monounsaturated)

Unsaturated- the carbon atoms have one or more double bonds (Polyunsaturated)

Fats
Over 70 different kinds of fatty acids have been extracted from living tissues

All fatty acids have long hydrocarbon chains

A fat or oil results when glycerol combines with one, two or three fatty acids, this is formed by a condensation reaction (a molecule of water is always removed, resulting in an ester bond). This type of condensation reaction is called esterification


Fats
What is a Lipid?
Lipids are a group of naturally occurring molecules that include fats, waxes, steroids, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others.
Triglycerides are lipids consisting of one glycerol molecule bonded with three fatty acid molecules. The bonds between the molecules are covalent and are called Ester bonds. They are formed during a condensation reaction

Phospholipids are similar to triglycerides in they consist of a glycerol 'backbone' and fatty acid 'tails', however, the third fatty acid has been replaced by a phosphate group 'head'.
What do lipids do?
Lipids perform many functions, such as:

Energy Storage

Making Biological Membranes

Insulation

Protection - e.g. protecting plant leaves from drying up

Buoyancy

Acting as hormones


Why doesn't oil and Water mix
Oil and water don't mix because oil is made up of non-polar molecules while water molecules are polar in nature. Because water molecules are electrically charged, they get attracted to other water molecules and exclude the oil molecules.
Oils
Oils are made from two kinds of molecules: glycerol (a type of alcohol with a hydroxyl
group on each of its three carbons) and three fatty
acids joined by dehydration synthesis.

The main distinction between fats and oils is whether they’re solid or liquid at room temperature
Fats
Lipids
Oils
Fats & Lipids
Yusuf Islam

Elliemay Louise Esqulant-Belle

Abdul
Mutaqabbir
Nazmul
Rafaul
Islam
Jabbar

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All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
All rights reserved @Yusuf Islam 2014
There are also 2 more types of lipids
which consist within the membrane of
the body cells' which are - cholestral and phospholipids.
Lipids and fatty acids are non-polar

Cell membranes are made of phospholipids
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