Which of the following types of lipids is characterized by a steroid nucleus and plays a crucial role in the regulation of membrane fluidity?

A Phospholipids
B Glycolipids
C Cholesterol ✓
D Triglycerides

Explanation

Cholesterol is a type of lipid that contains a steroid nucleus and plays a crucial role in regulating membrane fluidity by interacting with phospholipid molecules.

Mnemonic

_cholesterol = 'chole' (bile) + 'sterol' (solid), regulates membrane 'fluidity'

Source

Alberts Molecular Biology of the Cell
Lipid Metabolism Biochemistry Lipid Structure and Function Hard MEDICAL Confidence: high