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Describe how the structures of glycerophospholipids andsphingolipids cause them to spontaneously assemble into bilayers.Explain why free fatty acids and triglycerides do not form lipidbilayers

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Collen Von
Collen VonLv2
28 Sep 2019

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Drag each statement into the appropriate bin depending on whetherthe event occurs in the lumen of the small intestine, in a smallintestine epithelial cell, or in a lacteal.


a) Lipase breaks triglycerides down into monoglycerides and fattyacids.

b) Monoglycerides and fatty acids are reassembled to formtriglycerides.

c) Chylomicrons are transported in this structure toveins.

d) This structure contains lymph.

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f) Triglycerides are coated with phospholipids, cholesterol, andproteins to form chylomicrons.

Biology

How did the first membranes form resulting in something resembling a cell?

A. Since lipid bilayers can spontaneously assemble from lipids in an aqueous solution, it is possible that they formed around mineral aggregates trapping informational RNA and basic building blocks inside to generate something similar to a cell.
B. Since lipid channels an spontaneously develop from lipids in an aqueous solution, it is possible that they formed around mineral aggregates trapping informational RNA and basic building blocks inside to generate something similar to a cell.
C .Since protein transporters can spontaneously assemble from amino acids in an aqueous solution, it is possible that they formed around mineral aggregates trapping informational RNA and basic building blocks inside to generate something similar to a cell.
D. Since glycoproteins can spontaneously assemble from monosaccharides and amino acids in an aqueous solution, it is possible that they formed around mineral aggregates trapping informational RNA and basic building blocks inside to generate something similar to a cell.
E. None of these choices are possible.

A) What physical-chemical properties of fatty acids cause them to form micelles?

B) What physical-chemical properties of phospholipids cause them to form lipid bilayers?

C) Briefly describe the structure of a micelle and a lipid bilayer.

Briefly describe the differences between the structure of a micelle and a liposome

A) What physical-chemical properties

of a lipid bilayer allow it to be an effective semipermeable barrier towards ions in solution?

B) Would it be as effective a barrier towards hydrophobic molecules?

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