Chapter 8 Flashcards

1
Q

structural components of lipid membranes consist of

A

two hydrophobic tails and a hydrophilic head group

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2
Q

phosphatidate

A

glycerol-3-phosphate + 2 fatty acids = phosphatidate

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3
Q

lipids in plant cells

A

galactolipids , also can contain sulfolipids

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4
Q

spingolipids are derived from

A

the molecule sphingosine - a long chain amino alcohol

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5
Q

three classes of sphingolipids

A

-sphingomyelins, cerbrosides, gangliosides

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6
Q

explain that phospholipids and sphingolipids are constantly recycled in the cell

A

the bonds connecting fatty acid chains and the polar headgroups to the backbone are cleaved by enzymes called lipases

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7
Q

the membrane lipids of archaebacteria contain

A

long chain hydrocarbons linked to either end to glycerol

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8
Q

steroids are lipids and serve

A

as precursors for many biologically active products

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9
Q

phosphatidylinositols act as

A

intracellular signals

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10
Q

eicosanoids are

A

paracrine hormones and acts on cells near point of production

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