Question 1 Not yet answered Marked out of 1.00 The chemical structure shown belo

Question

Question 1 Not yet answered Marked out of 1.00 The chemical structure shown below is for sodium lauryl sulfate, a commonly used laboratory detergent. If you added this chemical to a culture of bacteria, they lyse. What would be a reasonable cause for this action on the cells? NOTE: Multiple answers may be correct Flag question -O Select all that apply: O a. Many SDS molecules in solution will form a micelle due to the hydrophobic tails and the cross out hydrophilic head. O b. The negatively charged oxygen atom would be exposed on the hydrophilic O c. The amphipathic nature of this molecule can result in SDS inserting into the O d. The nonpolar portion of SDS can form van der Waals interactions with the surface of the membrane. cross out cell membrane. cross out hydrocarbon chains of the phospholipids. cross out

Explanation / Answer

AnsA) a, b, c are correct.

These structural characteristics allow detergents to aggregate in aqueous media. At a sufficiently high concentration, the polar hydrophilic region of each molecule is oriented toward the polar solute (water) while the hydrophobic regions are grouped together to form thermodynamically stable micelles with hydrophobic cores. The hydrophobic core region of the detergent micelle associates with the hydrophobic surfaces of proteins and results in soluble protein-detergent complexes. Biological detergents are commonly used to disrupt the bipolar lipid membrane of cells in order to release and solubilize membrane-bound proteins.

AnsB) only e is correct

Leucine, serine, and glycine get in by active transport; proline gets in by facilitated diffusion. so proline is low.

AnsC

d,e are correct long chain phospholipid

Ans D

a is correct answer

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