MCB 2000 Final Questions with 100% Correct Answers

MCB 2000 Final Questions with 100% Correct Answers When does the synthesis of lipid occur? - High I/G ratio, excess calorie intake (excess carbons from glucose or excess dietary protein) What tissues are involved in the synthesis of lipids? - Liver (primary site in humans - 90%), adipose tissue How are the structures of triglycerides and phospholipids similar? - Both contain a glycerol backbone w/ 2 fatty acids attached, BUT PL attach a phosphate group w/ alcohol or polar head group and TG attaches a third fatty acid What determines the fate of acetyl CoA? How? - Insulin: if levels are high makes fatty acids, if levels are low (diabetic) makes ketone bodies (used by brain for energy reducing reliance on glucose) What happens if carb intake is restricted? - Insulin level is restricted and the body thinks it's in a fasted state, so it breaks down fat for energy What is needed for fatty acid synthesis? (3) - Acetyl CoA, NADPH, high I/G