<prompt> The double bond in cholesterol structure is found inRing DRing CRing BRing A  <response>: structure of cholesterol Cholesterol is a 27-carbon compound containing a steroid nucleus, which resembles a phenanthrene ring rings A, B, C to which a cyclopentane ring ring D is attached Methyl groups are attached at carbons 10 and 13. A side chain is attached at carbon-17. A hydroxyl group is attached at carbon-3. Double bond is present in Ring B. Reference: Harpers Illustrated Biochemistry 30th Edition Pg 219 