Biology Lecture 6 - Biology Lecture 6 Polysaccharide...

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Biology Lecture 6 Polysaccharide cellulose is major component of the tough wall of plant cells Most organic compound on earth due the plants Alpha glucose, the hydroxyl group is below the plane Beta glucose, the hydroxyl group is above the plane Our enzymes cannot digest cellulose Some microbes use enzymes to digest cellulose (for example cows and termites) Chitin- structural polysaccharide, found in the exoskeleton of arthropods Provides structural support for the cell walls of many fungi Lipids are not polymers Hydrophobic Include fats, phospholipids, and steroids Fats are constructed from 2 types of smaller molecules: glycerol and fatty acids Glycerol- three carbon alchohol with a hydroxyl group attached to each carbon Fatty acid- consists of a carboxyl group Fats separate from water A fat molecule is called a triacylglycerol Fatty acids vary in length and number of double bonds Saturated fatty acids- no double bonds, has maximum number of hydrogen atoms, solid at room temperature, come from animal fats, the fatty acid chain is straight
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Biology Lecture 6 - Biology Lecture 6 Polysaccharide...

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