This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
Lipids and proteins interact in membrane by 
Select and explain. 
A. Hydrophobic interactions, B. Both hydrophobic and covalent interactions, C. Covalent bonds, D. H bonds
A: Hydrophobic interactions
Answer: A: Hydrophobic interactions 
Explanation: The proteins and Lipid molecules are held together by the non covalent interactions such as Vanderwalls forces ( which holds the hydrophobic tails together ) and hydrogen bonding ( which binds the hydrophilic heads with water ) which help to stabilize the liquid bilayer structure