Longer-chain fatty acids will contain many more two-carbon units for oxidation than shorter chains

Longer-chain fatty acids will contain many more two-carbon units for oxidation than shorter chains, accounting for
disproportionate energy depletion and severe cardiac and skeletal disease in children with longer-chain enzyme deficiencies (incorrect answers a-c, e). Triacylglycerol is
the major fuel reserve in the body and is mainly stored and hydrolyzed in adipose tissue. Triglyceride and fatty acid metabolism become active during fasting after
glycogen stores are depleted in 3 to 4 hours. However, stores of triglycerides in heart and muscle are needed for energy even with adequate feeding. Glucose is important as a brain nutrient but will not be depleted by fatty acid oxidation. Glycogen (in animals) and starch (in plants) are glucose storage molecules. Glycogen is depleted with fasting but is not the major fuel reserve in mammals