Final answer:
Steroid hormones, which are synthesized from cholesterol and feature a structure with three 6-membered rings and one 5-membered ring, are a class of lipid-derived hormones.
Step-by-step explanation:
The class of hormones that has a characteristic cyclic portion made of three 6-membered rings and one 5-membered ring, and are synthesized from cholesterol, is steroids. Steroid hormones are a type of lipid-derived hormones, which are known for their insolubility in water. Since they are derived from cholesterol, they are able to diffuse across plasma membranes due to their non-polar nature. Examples of steroid hormones include estrogen and testosterone, which have critical roles in the human body.
The class of hormones that has a characteristic cyclic portion made of three 6-membered rings and one 5-membered ring, and are synthesized from cholesterol is Steroids.
Steroids are lipid-derived hormones, which are water soluble and can diffuse across cell membranes because they are non-polar. Examples of steroid hormones include estrogen and testosterone, which are derived from cholesterol. Steroid hormones have a characteristic four-ring structure, with three 6-membered rings and one 5-membered ring.