DNA is important, because it contains the genetic "code" for heredity, growth/reproduction, and responding to stimuli, which are all necessary to life. RNA is important because it contains the temporary genetic "code" for creating proteins, which are important for an organism.
Proteins are related to nucleic acids because they are created by RNA, which is a form of nucleic acid. Proteins are important for cells because they keep an organism sturdy by supporting its structure. Also, proteins break down foods, which is good so the nutrients in the foods can be sent throughout the organism. It is necessary to have protein in every cell so every cell is healthy, and can support the cell's structure.
Phospholipids in cells are important because they create the cell membrane, which protects the cell and prevents certain things from entering and exiting the cell.
Nucleic Acids, Proteins, Lipids, and Water are all responsible for performing each characteristic of life in an organism, as well as other functions such as transport and repair. These ingredients are necessary for a cell to survive because they provide the cell with the items it needs, keeps it healthy, and keeps it functioning properly, as well as keeps it sturdy.
Cells are able to communicate with the world around them thanks to lipids and carbohydrates. Cholosterol and Hormones, both types of lipids, help in cell communications, as well as starches. Lipids and proteins help a cell respond/react to stumuli because lipids store and release great amounts of energy, and proteins break down food if nutrients are needed throughout the body.
A cell relies on water to maintain homeostasis because water plays a big role in maintaining homeostasis. If a cell has too much water, it will get rid of the excess water via going to the bathroom. If not, the cell will drown and die. If there is too little water, a signal will be sent to the brain that the organism needs to drink. If not, the organism will be dehydrated and can die. Water helps get rid of waste in an organism by carrying it out, and exiting the organism. Water and homeostasis are important for life because they help keep an organism well-balanced.