Glycerophospholipids (PIP2) & Cell Signaling
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Questions and Answers

Cardiolipins are found in the plasma membrane of all cells.

False

Phospholipids are a type of compound lipid.

True

Plasmalogens are ether lipids with an ether-linked alkene chain.

True

Sphingomyelins are a type of glycerophospholipid.

<p>False</p> Signup and view all the answers

Platelet-activating factors (PAF) are ether lipids with a saturated ether-linked chain.

<p>True</p> Signup and view all the answers

Phospholipase A2 is involved in the synthesis of eicosanoids.

<p>True</p> Signup and view all the answers

Sphingophospholipids have sphingosine as the alcohol component, while glycerophospholipids have glycerol as the alcohol component.

<p>True</p> Signup and view all the answers

Phospholipids are amphipathic molecules, having both hydrophilic and hydrophobic parts.

<p>True</p> Signup and view all the answers

Phosphatidic acids (PAs) are the simplest form of phosphoglycerolipids and typically contain saturated fatty acids at both positions.

<p>False</p> Signup and view all the answers

Phospholipids are the major structural component of all biological membranes, accounting for approximately 40% of the total lipids in red blood cells and 75% of the lipids in the inner mitochondrial membrane.

<p>True</p> Signup and view all the answers

Phospholipids are used as detergents and for coating fat droplets to aid in their transport in the body.

<p>True</p> Signup and view all the answers

Sphingomyelins are a type of glycerophospholipid, containing a glycerol backbone with two fatty acid chains.

<p>False</p> Signup and view all the answers

Phosphatidic acid (PA) is an intermediate in the biosynthesis of phospholipids and triglycerides (TGs), but it is not found in tissues to any significant extent.

<p>True</p> Signup and view all the answers

Sphingomyelins are a type of glycerophospholipid.

<p>False</p> Signup and view all the answers

Phospholipids are classified as compound lipids because they contain a phosphate group attached to a glycerol backbone.

<p>True</p> Signup and view all the answers

Lecithins, also known as phosphatidylcholines (PC), are glycerophospholipids that contain choline as the polar head group.

<p>True</p> Signup and view all the answers

Snake venom contains an enzyme called lecithinase, which hydrolyzes the fatty acids in lecithin, causing hemolysis of red blood cells and blood clotting.

<p>True</p> Signup and view all the answers

Cardiolipins are a type of glycerophospholipid found in bacterial cell membranes.

<p>False</p> Signup and view all the answers

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