From 'Of Mice and Men' what is Lennie's last name? Lennie's last name is Small. It's supposed to be ironic, and John Steinbeck makes it obvious that Lennie is clearly not very small.
Fats, like other lipids, are generally hydrophobic, and are soluble in organic solvents and insoluble in water. Fat is an important foodstuff for many forms of life, and fats serve both structural and metabolic functions. They are a necessary part of the diet of most heterotrophs (including humans).
Cholesterol is a very unique type of fat, however. Many types of fats have a fairly simple chemistry. For example, fatty acids (one very important kind of fat) are basically straight chemical chains.