BSC 108 Lecture Notes - Lecture 3: Nitrogenous Base, Dietary Fiber, Thymine

• School: University of Alabama
• Department: Biological Sciences
• Course: BSC 108
• Professor: Christine J.Yates

Document Summary

The u. s. is one of the world"s leading markets for sweeteners. The average american consumes about 64 kg or 140 pounds of sugar per year. Hfcs 55 (mostly used in soft drinks), approximately 55% fructose and 42% glucose. They are long chains of sugar units. Cellulose is the most abundant organic compound on earth. Most animals cannot derive nutrition from fiber. For energy storage- store higher amount of energy/gram in fats than in carbohydrates. Similar to neutral fats in that they are composite molecules. Contain glycerol, 2 fatty acids, and po4. Part of molecule associates with water, but part of it does not***** The phospholipid bilayer form structure of membranes. Saturated - no double bonds; solid; come from animal products. Unsaturated- contain 1 or more double bonds; liquid; comes from plant products. Has 3 parts: 5-carbon sugar, a phosphate group, a nitrogenous base. Dna resides in cells in long fibers called chromosomes.