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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