Chapter 10: Assignment Questions COMPLETE Flashcards
An amphiphilic (or amphipathic) molecule has:
a polar end
a nonpolar end
both!
both!
Which end of a Phospholipid is Polar?
The Head
The Tail
The Head
All are Phospholipids except:
Phosphatidylethanolamine
Phosphatidylerine
Phosphatidylcholine
Sphingomyeilin
Sphingosine
Sphingosine
Which is the Polar end of Cholesterol?
The Hydroxyl Group (top)
Methyl Group (bottom)
Hydrocarbon Region (middle)
The Hydroxyl Group (top)
In water, which atoms carry a partial negative charge?
oxygen
hydrogen
oxygen
In water, which atoms carry a partial positive charge?
oxygen
hydrogen
hydrogen
Which side of a Phospholipid is water most likely to interact with?
The Fatty Acid Tail (hydrophobic)
The Polar Head (hydrophillic)
The Polar Head (hydrophillic)
How many Phospholipid Leaflets make up a Micelle?
1
3
2
1
Which is the least likely movement of a lipid in a lipid bilayer?
lateral diffusion
flip-flop
rotation
flip-flop
Phospholipids are generally synthesized on only one leaflet of a lipid bilayer. Movement of one of these lipids to the other leaflet requires:
flippases/translocases
rotation
lateral diffusion
flippases/translocases
Enrichment of which type of lipid in a domain of a lipid bilayer leads to a greater distance across the bilayer?
amphipathic lipid with unsaturated fatty acid tails
amphipathic lipid with saturated fatty acid tails
amphipathic lipid with saturated fatty acid tails
Which would give a lipid bilayer greater fluidity?
amphipathic lipid with unsaturated fatty acid tails
amphipathic lipid with saturated fatty acid tails
amphipathic lipid with unsaturated fatty acid tails
Which side of a Phosopholipid Bi-Layer is Carbohydrates found?
Extracellular Side
Cytosol
Towards the extracellular side
Integral membrane protein are:
Hydrophobic (only in membrane)
Hydrophilic (only outside membrane)
Amphipathic (both inside and outside membrane)
Amphipathic (both inside and outside membrane)
Peripheral Protein are:
Hydrophobic (only in membrane)
Hydrophilic (only outside membrane)
Amphipathic (both inside and outside membrane)
Hydrophilic (only outside membrane)