Which series depicts the order in which the precursors of steroid hormones are synthesized?

Question

Quizplus · Accepted Answer

11ecba2d_0e77_f5b5_a3bf_299f9121a328_MD0008_00 Steroid hormones are involved in multiple critical signaling pathways in the body, including those related to physical development, reproduction, and stress. All steroid hormones are synthesized from cholesterol and share a common backbone structure consisting of four fused rings: 3 six-member rings and 1 five-member ring. The basic unit of cholesterol is a branched five-carbon molecule belonging to a class known as isoprenes. Isoprenes can combine with each other to form larger units known as terpenes. Terpenes consisting of two isoprene units are called monoterpenes, those consisting of two monoterpenes (or four isoprenes) are called diterpenes, and those consisting of three monoterpenes (six isoprenes) are called triterpenes. During cholesterol synthesis, a triterpene known as squalene forms. Squalene undergoes multiple steps, including demethylation, methyl rearrangements, and cyclization, to form cholesterol. The correct order of synthesis for the precursors of steroid hormones is isoprene → monoterpene → squalene → cholesterol. (Choices B, C, and D) Each of these options either has something other than cholesterol as the final product or something other than isoprene as the starting material. Steroid hormones are synthesized from cholesterol, which is made of several isoprene units linked together. Educational objective: Steroid hormones are derived from cholesterol. Cholesterol has a characteristic four-ring backbone, which is synthesized from five-carbon subunits called isoprenes. Two isoprenes joined together form a monoterpene, and six isoprenes can join to form a triterpene called squalene, which then cyclizes and, after several steps, forms cholesterol.

Which Series Depicts the Order in Which the Precursors of Steroid