3. Number of Detergent Molecules per Micelle When a dr small amount of the deter

Question

3. Number of Detergent Molecules per Micelle When a dr small amount of the detergent sodium dodecyl sulfateto (SDS; Na CH3(CH2)1OS0) is dissolved in water, the deter me tha detergent is added, a concentration is reached (the critical of micelle concentration) at which the monomers associate toob gent ions enter the solution as monomeric species. As more form micelles. The critical micelle concentration of SDS is 8.2 mM. The micelles have an average particle weight (the sum of the molecular weights of the constituent monomers) of 18,000. Calculate the number of detergent molecules in the average micelle. can int ra 4. Properties of Lipids and Lipid Bilayers Lipid bilayers cyt formed between two aqueous phases have this importantext property: they form two-dimensional sheets, the edges of eve which close on each other and undergo self-sealing to formjus an (a) What properties of lipids are responsible for this prop- fol fra (b) What are the consequences of this property for the the of pro vesicles (liposomes) erty of bilayers? Explain. structure of biological membranes? 5. Pr Length of a Fatty Acid Molecule The carbon-carbon

Explanation / Answer

3. Here, the critical Micelle concentration does not play a role in calculting the number of molecule per micelle.

The average particle weight of the micelle is 18000, i.e., the sum of mol wt of all monomers in micelle.

Hence the number of detergent molecule per micelle is= average particle weight of the micelle/mol wt of the monomer

Molecular wt of SDS is 288

number of detergent molecule per micelle= 18000/288 = 62.5 (approx 63)

4. Biology question posted in wrong subject catagory

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