. Tween 20 and Tween 21 have a HLB value of 16.7 and 13.3 respectively. Which of the following statements is true for these? The alkyl chain length of Tween 20 and Tween 21 is same but the total PEG headgroups are higher for Tween 21. The alkyl chain length of Tween 20 and Tween 21 is same but the total PEG headgroup are lower for Tween 21. O The total headgroups of Tween 20 and Tween 21 are same but the alkyl chain length of Tween 20 is higher than Tween 21 O The total headgroups of Tween 20 and Tween 21 are same but the alkyl chain length of Tween 20 is lower than Tween 21

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.