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MCAT Organic Question — Hormone

Which of the following molecules is a hormone capable of creating physiological and anatomical changes during adolesence which will last a person’s entire life?









A: Polypeptide. Note all of the amide bonds. This polypeptide is vasopressin.

B: Classic four-ring steroid structure. This is estradiol.

C: Sugar ring attached to nitrogenous base makes this a nucleotide. This is cytosine monophosphate.

D: Lengthy carbon chains attached to a phosphate group indicates a phospholipid.


The question makes reference to a steroid hormone such as testosterone. That’s (B).


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