Amino acids - Amino acids are acids that join together to form proteins, which in turn are essential to life. An example of thigs formed by amino acids is DNA and RNA for example.
Lipid - Lipids are molecules that have many function is our body such as storing energy and they also form part of cell membranes which are very important to life as well.
Proteins - Protenis are molecules that are necessary for life mainly because of all the diffrent functions in cells and the way they function.
Hope it helped,
BioTeacher101
