SteroidsA steroid has a drastically different structure from that of fats. Steroids are lipids having a particular fused-ring structure; a ring structure which has three six-carbon rings and a five-carbon ring. All steroids have this basic unit in their structures. Steroids include a wide variety of molecules, including cholesterol and its derivatives such as steroid hormones, and have tremendous biological significance. The steroid hormones include adrenocorticoid hormones and sex hormones.
Notice that all these compounds have the fused-ring structure that we mentioned earlier. In fact, cholesterol acts as the starting material for the synthesis of steroid hormones. The steroid hormones play a very important role in the proper development and functioning of our body. The structures given above are just for reference and understanding the general structural integrity of steroids. You donâ€™t have to memorize.