Which of the following lipid molecules is characterized by a steroid nucleus and plays a crucial role in the regulation of cholesterol homeostasis?

A Cholesterol ester
B Bile acid
C Oxysterol ✓
D Phospholipid

Explanation

Oxysterols are a class of lipid molecules that contain a steroid nucleus and play a crucial role in the regulation of cholesterol homeostasis by acting as ligands for nuclear receptors and regulating gene expression.

Mnemonic

Oxysterol = Oxygen + Sterol, regulator of cholesterol

Source

Journal of Lipid Research
Lipid Metabolism Biochemistry Cholesterol Homeostasis Hard MEDICAL Confidence: high