Exercise: Membrane Structure And Functions

Questions for: Membrane Structure And Functions

The model that is now known to be correct for the structure of biological membrane is
A:
Fluid mosaic model
B:
Page's model
C:
Lac Operon model
D:
Lock and Key model
Answer: A
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Cholesterol is essential for normal membrane functions because it
A:
plugs up the cardiac arteries of older men
B:
cannot be made by higher organisms
C:
keeps membranes fluid.
D:
spans the thickness of the bilayer
Answer: C
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In active transport, the membrane structure that functions is
A:
cholesterol
B:
integral proteins
C:
carbohydrates
D:
hydrophobic molecules
Answer: B
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Bacteriorhodopsin
A:
absorbs light and pumps protons
B:
is an integral membrane protein
C:
contains primarily alpha-helical residues
D:
all of the above
Answer: D
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Cholesterol is somewhat amphipathic due to
A:
the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule
B:
the long branched hydrocarbon along with the four hydrocarbon rings
C:
the five-methyl groups along with the hydrocarbon chain
D:
the three six-membered rings along with the single five-membered ring
Answer: A
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