The Structure And Function Of The Plasma Membrane - Cell and Molecular Biology

What kind of membrane protein is found entirely outside the bilayer on either the extracellular or cytoplasmic surface and is covalently linked to a membrane lipid situated within the bilayer?

A)integral protein
B)lipid-anchored protein
C)peripheral proteins
D)carbohydrate-anchored protein
E)transmembrane

Answer

Question 2

(Multiple Choice)

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Figure 4.12 shows the oligosaccharides attached to membrane lipids thus forming gangliosides that determine the A, B and O blood groups. Which statement regarding the arrangement of sugars is INCORRECT?

A)A person with O blood type would have gangliosides with terminal fucose residues only exposed on their glycolipids.
B)A person with A blood type would have gangliosides with both terminal fucose and terminal N-acetylgalactosamine residues exposed on their glycolipids.
C)A person with B blood type would have gangliosides with terminal fucose and galactose residues on their glycolipids.
D)A person with AB blood type would have gangliosides with terminal fucose, terminal N-acetylgalactosamine and terminal galactose residues exposed on their glycolipids.
E)all statements are correct

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Question 3

(Multiple Choice)

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Why might integral membrane proteins be difficult to study based upon what you know of their amino acid composition?

A)They are difficult to isolate in soluble form due to their hydrophobic transmembrane domains.
B)They are difficult to isolate in soluble form due to their hydrophilic transmembrane domains.
C)They are too small.
D)They are too large.
E)None of these are correct.

Answer