CHEM 210 Module 5 Exam Newest

CHEM 210 Module 5 Exam Newest 1. How is the definition of lipid different from protein and carbohydrate?: The lipid definition is based on the functional definition of being soluble in a non-polar solvent. Proteins and carbohydrates are based on the structure. 2. What are three functions of lipids?: Any three of: energy, storage, vitamin, protection, and insulation 3. How does the omega numbering system differ from the simplified nota- tion?: The simplified notation starts number at the carboxylic acid, while the omega system starts at the opposite end - from the -CH3. 4. What does unsaturated mean for a fatty acid?: Unsaturated indicates that one or more double bonds are present. 5. What is the difference between a fat and oil?: An oil is a lipid that is a liquid at room temperature, while fat is a solid at room temperature. 6. How are phosphoglycerides similar to triacylglycerols? How they different?- : similar: Both have glycerol as a backbone structure. Both have fatty acids attached to the glycerol. Differences: phosphoglycerides have two fatty acids attached to the glycerol and, as the name implies, triacylglycerols have three fatty acids. Phosphoglyceride has a polar head group attached. 7. What is the primary function of phosphoglycerides mentioned in this mod- ule?: forming membrane bilayers 8. Describe at least two functions of sphingolipids.: They serve as blood group determinants, the structure of membrane bilayers, and in the myelin sheath of neurons. 9. What is the main difference between phosphoglycerides and sphin- golipids?: Sphingolipids have a ceramide backbone structure, whereas the phos- phoglycerides have a glycerol structure. 10. How many carbons and double bonds are in an isoprene unit?: 5 carbons and one double bond