Lipids, Biology

Lipids

Lipids are oily or greasy organic compound forming about 3% of protoplasm. These are also compound of carbon hydrogen and oxygen but unlike carbohydrates. The hydrogen and oxygen, in them 2:1 ratio the amount of oxygen is considerably less. Being insoluble in water and soluble in organic solvents like acetone, chloroform benzene, hot alcohols ether, kerosene, petroleum, etc, lipids occur in protoplasm as minute globules.  

The simplest and most abundant lipids are neutral or true fats, called   simple lipids. These are esters of long chain fatty acids and glycerol. Each fat molecule is formed by combination of usually three fatty acid molecules linked with one molecule of glycerol and hence it is called a triglyceride. This linkage is called ester bond three molecules of water are released in it. Hence this is also a compensation dehydration synthesis.   A fatty   acid molecule is no polar with a single, water soluble carboxylic acid group (COOH) and a long, water insoluble hydrocarbon chain, the latter may be fully saturated or unsaturated. Fatty acids are of several kinds, but   two of these viz, palmitic acid and oleic acid are the parent compounds respectively of all saturated and unsaturated fatty acids. Being synthesized by joining of two carbon acetyl units, nearly all fatty acids have an even number of carbon atoms from 2 to 24   similar or different fatty acids may participate in the composition of a fat molecule.

Posted Date: 9/26/2012 6:53:55 AM | Location : United States







Related Discussions:- Lipids, Assignment Help, Ask Question on Lipids, Get Answer, Expert's Help, Lipids Discussions

Write discussion on Lipids
Your posts are moderated
Related Questions
Determine Causes of Malnutrition? You may recall studying about the causes of malnutrition earlier. The causes of malnutrition are classified as immediate (individual level), u

DISORDERS OF UPPER RESPIRATORY TRACT: Common Cold: It is most frequent and most common infection in infants  and children. Common cold corresponds  to  acute nasopharyn

Aid-giving behaviour between genetically related individuals in animal groups is often observed in nature. This aid-giving behaviour can evolve when the advantages of helping relat

You are setting up a PCR reaction. a) The total volume of your reaction is 50 uL. Your stock primer solutions are 25 mM each. You want a final concentration of primer of 1 mM in yo

Do echinoderms present internal or external fecundation? Is there sex division among individuals? The fecundation in echinoderms is external; gametes are liberated in water whe

Q. What is the formula of the net primary production (NPP)? How does NPP relate to the energy pyramids? The Net primary production is the gross primary productivity less the or

Determine the Food Sources of Pyridoxine? Raw foods contain more of this vitamin than cooked foods. The food sources include: 1. Rich sources: Rice polishing s, wheat bran,

Pollen Tube Growth There are significant differences in the fine structure of the tips of pollen tubes in compatible and incompatible pistils such as Lilium. Tubes growing in

Rh-factor It is one of the factor associated with blood. In addition to ‘A', ‘B', ‘AB' and ‘O' groups, Rh factor test is also done in the blood. People having Rh factor a

Determine SNP variation among the aligned DNAs for a genomic region.   See below for how to count SNP variation.  The output file (Your_name_snp.txt) should have two