Membrane Lipids Structure Quiz

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What is the backbone of Glycerophospholipids?

Phosphatidylinositol

Phosphatidylglycerol

Glycerol-3-phosphate (correct)

Cardiolipin

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

High molecular weight

Negative charge

Neutral charge (correct)

Positive charge

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

Cardiolipin

Phosphatidylethanolamine

Phosphatidylcholine

Phosphatidic acid (correct)

What is the key structural difference between Sphingosine and Glycerophospholipids?

Glycerol backbone Signup and view all the answers

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 Signup and view all the answers

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

Sphingolipids Signup and view all the answers

What is the overall charge of phosphatidylserine?

Negative Signup and view all the answers

Which type of chains are bent in glycerophospholipids?

Unsaturated chains Signup and view all the answers

What type of bonds do phospholipases hydrolyze in glycerophospholipid molecules?

Ester bonds Signup and view all the answers

What is the role of GPI anchors in biological membranes?

Attach certain proteins to the membrane surface Signup and view all the answers

What type of bonds do lipases hydrolyze in lipids?

Ester bonds Signup and view all the answers

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

They contain phosphate groups Signup and view all the answers

Why are glycerophospholipids classified as 'bipolar'?

They possess both nonpolar and polar parts Signup and view all the answers

What chemical feature causes the bending in unsaturated lipids?

Presence of a double bond Signup and view all the answers

What structural component allows sphingolipids to form a bilayer?

Sphingosine backbone Signup and view all the answers

What distinguishes glycolipids from glycerophospholipids and sphingolipids?

Presence of carbohydrates instead of phosphate-alcohol groups Signup and view all the answers

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

Formation of ceramide Signup and view all the answers

Membrane Lipids Structure Quiz

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