MMSC407 LIPIDS Exam Questions with Complete Solutions

MMSC407 LIPIDS Exam Questions with Complete Solutions What are lipids? - Answer-Fatty, oily, waxy substances of animal or vegetable origin which are INSOLUBLE in water but are soluble in nonpolar solvents When are lipids insoluble and soluble? Answer--Insoluble in water and soluble in nonpolar solvents -Nonpolar solvents: chloroform, ether, alcohol What are the types of lipids? - Answer- Saturated fatty acids - Answer--Primarily animal fat -no carbon double bonds -Solid at room temp **THINK butter, lard Unsaturated fatty acids - Answer--Primarily vegetable fat -Double carbon bonds -Liquid at room temp **Think olive oil! Mono-unsaturated - Answer-one double bond Poly unsaturated - Answer-2 or more double bonds Non-Esterified FREE fatty acids - Answer--Small amount of fatty acid bound to albumin! -MOST fatty acids are bound to triglycerides and phospholipids What are most fatty acids bound too? - Answer--Triglycerides and phospholipids Structure of Triglycerides - Answer-glycerol and 3 fatty acids What is the reason we have triglycerides? - Answer--It allows the body to compact fatty acids onto a smaller space to be used for energy -free floating fatty acids take up more space than triglycerides -Account for 98-99% of lipids in diet!