Why are the vertebrate sex hormones estradiol and testosterone considered to be lipids?

Question

Quizplus · Accepted Answer

Estradiol and testosterone are considered to be lipids because their carbon skeletons are composed of primarily C-C and C-H bonds, which are characteristic of lipid molecules. Although they are not made of fatty acids and are hydrophilic compounds, these properties do not define lipids as a class, making options C and D incorrect. The fact that they are essential components of cell membranes is also not a defining characteristic of lipids, as not all lipids are membrane components.

Why Are the Vertebrate Sex Hormones Estradiol and Testosterone Considered