Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
The word lipid indicates a wide range of compounds.
Member rating:
(1 vote)
| Words:
| Submitted: Sun Oct 05 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
Lipids The word lipid indicates a wide range of compounds.These may conveniently be divided into two groups - the first consists of fats and oils, the second includes steroids and terpenes together with fat-soluble vitamins and some other compounds. Fats, oils and phospholipids are the most common lipids in living cells. Lipids contain elements C, H and O with the ratio of H : O is greater than 2:1, example: C6H38O6. Lipids are denser than carbohydrates (because of these extra H atoms) and therefore contain more chemical potential energy, than carbohydrates. A gram of lipid yields more kinetic energy (38 Kj) when oxidised than a gram of carbohydrate (17Kj). Lipids are made up of two parts: * Glycerol. * Fatty acids. Lipids are formed by dehydration synthesis of glycerol (alcohol) and 3 fatty acids. Lipids also contain small amounts of other elements, such as phosphorus. Lipids can be: * Fats: Are solid at room...
To see the full version of this document, and 145,348 others
