MichaelXY said:Google Lipids.
Steroid molecules have a four-ring structure, while phospholipids have a glycerol backbone with two fatty acid chains and a phosphate group. Fats, also known as triglycerides, have a glycerol backbone with three fatty acid chains.
Cholesterol is an essential component of steroid molecules and is responsible for maintaining the fluidity and stability of cell membranes. It also serves as a precursor for the production of hormones such as estrogen and testosterone.
The structural differences between these molecules allow them to carry out different functions in the body. Steroids play a role in hormone production and cell membrane stability, phospholipids make up the cell membrane and help with cell signaling, and fats serve as a source of energy and insulation.
Yes, all three types of molecules can be found in biological systems. Steroids and phospholipids are both present in cell membranes, and fats can be found in adipose tissue and as a component of cell membranes.
Steroids and phospholipids are both amphipathic molecules, meaning they have both hydrophilic and hydrophobic regions, allowing them to interact with both water and fats. Fats, on the other hand, are hydrophobic and insoluble in water.