Lipid rafts are microdomains of eukaryotic cell membranes that contain [____], s

Question

Lipid rafts are microdomains of eukaryotic cell membranes that contain [____], sphingolipids,

and certain membrane proteins with extended membrane-spanning [____] that form aggregates in the

plane of the bilayer. Because the hydrocarbon chains of [____] are longer and straighter than those of

other membrane phospholipids, raft domains are [____] than other parts of the bilayer. These lipid rafts

concentrate and organize [____] that have physically related activities, as in membrane transport or

(1) cholesterol; alpha helices; sphingolipids; thicker; membrane proteins

(2) phospholipids; amphipathic helices; unsaturated fatty acids; more rigid; vesicles

(3) unsaturated fatty acids; alpha helices; saturated fatty acids; less fluid; transporters

(4) cis-monounsaturated fatty acids; domains; sphingolipids; more fluid; lipids

(5) phospholipids; hydrophobic; cholesterol; thinner; cell-surface proteins

Explanation / Answer

(1) cholesterol; alpha helices; sphingolipids; thicker; membrane proteins

Lipid rafts are microdomains of eukaryotic cell membranes that contain [_cholesterol___], sphingolipids,

and certain membrane proteins with extended membrane-spanning [_alpha helices___] that form aggregates in the plane of the bilayer. Because the hydrocarbon chains of [_sphingolipids___] are longer and straighter than those of

other membrane phospholipids, raft domains are [__thicker__] than other parts of the bilayer. These lipid rafts

concentrate and organize [_membrane proteins___] that have physically related activities, as in membrane transport

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