This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell Membrane and transpo protiens, Subject name: Physiology
At low concentrations, phospholipids form:- 
Select and explain. 
A. Chylomicrons, B. Micelles, C. Monolayer, D. Bilayer
C: Monolayer
Answer: C: Monolayer 
Explanation: Phospholipids Low concentrations form monolayer Eg: Surfactant Moderate concentrations phospholipids forms circular aggregates Eg: Micelles High concentrations forms bilayer Eg: Cell membranes (made of lipid bilayers)