4. Amphiphilic Lipids. Detergents are small amphiphilic molecules that tend to form micelles in water.(a) Draw the structures of sodium dodecyl sulfate (SDS) and Triton X-100(b) For each drawn detergent, indicate which portions (ends) of the molecules are hydrophilic andhydrophobic. Justify your answer (explain why hydrophilic vs hydrophobic).(c) Draw the micelle structure for one of the detergents.(d) Why does the detergent form a micelle and not a bilayer? Why do detergents denature proteins andremove grease from your clothing?

Ionic detergents contain anionic or cationic head group long with their hydrophobic tails being straight hydrocarbon chains. The nonionic detergents are obtained by condensing compounds having a hydrophobic molecular group with ethylene oxide or propylene oxide.ANSWER: QA and QB. The figure below shows the structure of the detergent Sodium dodecyl sulfate and Triton X-100. the figures also shows the portions of the molecules that are polar and hydrophilic and nonpolar or hydrophobic. The aliphatic and hydrocarbon rings are nonpolar since they there is no separation of charge observed in these portions due to the comparable electronegativity of the carbon and hydrogen. However in the polar head regions since the atoms such as carbon and oxygen or hydrogen nd hydrogen have different electronegativities there is a separation of charge or the bonded electrons and hence these regions of the molecules are polar and tend to interact favorably with water. ANSWER: QC. The figure below shows the schematic representation of the micelles formed by Sodium dodecyl sulfate ANSWER: QD The detergent, having single hydrophobic tail unlike phospholipids forms micelles rather than bilayer with the polar head facing the aqueous environment and the hydrophobic tails facing the interior away from interaction with water. The detergents present in solution interfere with the noncovalent interactions like hydrophobic interaction nd hydrogen bonding within protein molecule nd hence disrupt the interactions that are crucial from holding the three dimensional structure of the proteins together. Hence the proteins denature or loose their structure in presence of detergent. Grease is hydrophobic in nature- hence when present in the aqueous solution they re encapsulated within the micelles tht is formed by the detergent s is shown above and hence gets removed during washing.