What type of molecule is estrogen made of

Explanation: Estrogen are steroid hormones which are made up of special molecules with a four ringed carbon atom back bone. A series of chemical reaction occurs spurred by an enzyme which removes and add groups to cholesterol core. This action transforms it into pregnenolone and then into androgens, then special aromatase enzyme convert androgen into estrogen.

d. organisms have cells with different shapes and functions.