Testosterone and estradiol are male and female sex hormones, respectively, in many vertebrates. In what way(s) do these molecules differ from each other? Testosterone and estradiol ______.
A) are structural isomers but have the same molecular formula
B) are cis-trans isomers but have the same molecular formula
C) are enantiomers of the same organic molecule
D) have different functional groups attached to the same carbon skeleton
Answer: D) have different functional groups attached to the same carbon skeleton