Tuesday, November 2, 2010

Notes for lipids

The types of lipids are Fats, Olis, Phospholipids, Steroids, and Waxes. The organism uses for fats are long-term energy storage and thermal insulation in animals. The human uses are butter and lard.
The organism uses for olis are longterm energy storage in plants and their seeds. We use them for cooking olis. Phospholipids are used by organisms for component of plasma membrane and in humans for non-stick pan spray. Organism uses for steroids are component of plasma membrane and hormons. We use them for medicines. Waxes for organisms wear reisistance and retain water. In humans we use waxes for candles and polishes.
Triglycerides are fats. They have long term energy storage and have three fatty acids attached to each glycerol molecule. Olis are unsaturated fatty acid with double bonds. Phosopholipds are derived from triglycerides. Steroids skeletons is of four fused carbon rings. Waxes have a long chain fatty acid bonded to a long-chain alcohol. They have a high melting point, water proof, and resistant to degradation.
Molecules self arrange when placed in water, the polar phosphates which are the heads are next to the water. The non-polar fatty acid which are the tails overlap and exclude water. They form double layer and make a sphere.

Molecules that are Polysaccharides are starch, cellulose, glycogen, and chitin. Some foods that have polysaccharides are cookies, orange juice, starch, kix and cheerios. Molecules that are Monosaccharides are glucose, fructose and galactose. Foods that have monosaccharides are corn syrup and honey.
 

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