Cholesterol is found in the cell membrane of many organisms and in blood and bile. It is a precursor of the hormones cortisone, testosterone, estrogen, progesterone and other steroid hormones. Cholesterol has methyl groups attached to positions 10 and 13.
Carbohydrates are among the most widely distributed compounds in both plant and animal kingdoms. The most important function of carbohydrates is to provide energy to the body. They are also structural components of tissues. Other functions include regulation of flat metabolism, protein sparing functions, and function in the digestive tract.