This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Structure & Function of Proteins), Subject name: Biochemistry
Which of the following is a weak bond - 
Select and explain. 
A. Covalent bond, B. Peptide bond, C. Disulphide bond, D. Hydrophobic interactions
D: Hydrophobic interactions
Answer: D: Hydrophobic interactions 
Explanation: Ans. is 'd' i.e., Hydrophobic interactions o Strongest bond - Covalento Weakest bond - Van der walls forcesMoleucular interactionso There are two types of interactions between molecules that stabilize molecular structures :-i) Covalent bonds, e.g. peptide bonds and disulphide bonds, ii)ii) Non-covalent bonds.Molecular interaction|| |Non-covalent bonds# Electrostatic interactions (salt bridges or ionic bonds)# Hydrogen bonds# Hydrophobic interactions# Van Der Waal forcesCovalent bondsStrength of various interactions (in decreasing order)Covalent (strongest) > Electrostatic (ionic or salt linkage) > hydrogen > hydrophobic > Van der waal's (weakest)