Membrane Lipids Structure Quiz

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17 Questions

What is the backbone of Glycerophospholipids?

Glycerol-3-phosphate

What is the structural difference between phosphatidylethanolamine and phosphatidylcholine that makes them stay in the origin in Electrophoresis?

Neutral charge

Which lipid will travel towards the positive in Electrophoresis due to its overall negative charge?

Phosphatidic acid

What is the key structural difference between Sphingosine and Glycerophospholipids?

Glycerol backbone

Which lipid is formed when the 1st and 2nd hydroxyl groups of glycerol are linked to fatty acids and only the 3rd hydroxyl group is attached to a phosphate group?

Phosphatidic acid

Which lipid results from the esterification of serine with palmitic acid?

Sphingolipids

What is the overall charge of phosphatidylserine?

Negative

Which type of chains are bent in glycerophospholipids?

Unsaturated chains

What type of bonds do phospholipases hydrolyze in glycerophospholipid molecules?

Ester bonds

What is the role of GPI anchors in biological membranes?

Attach certain proteins to the membrane surface

What type of bonds do lipases hydrolyze in lipids?

Ester bonds

What is the defining characteristic of membrane lipids mentioned in the text?

They contain phosphate groups

Why are glycerophospholipids classified as 'bipolar'?

They possess both nonpolar and polar parts

What chemical feature causes the bending in unsaturated lipids?

Presence of a double bond

What structural component allows sphingolipids to form a bilayer?

Sphingosine backbone

What distinguishes glycolipids from glycerophospholipids and sphingolipids?

Presence of carbohydrates instead of phosphate-alcohol groups

What is the result if the phosphate and alcohol in sphingolipids are replaced with hydrogen?

Formation of ceramide

Test your knowledge on the structure of membrane lipids, including cholesterol, phospholipids, triacylglycerol, glycerophospholipids, sphingolipids, and phosphatidylinositol. Learn about the composition and properties of these important components of cell membranes.

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