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Pre-Test
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1
Which one of the following biological macromolecules is least likely to be a component of a biomembrane?
A)Lipids
B)Carbohydrates
C)Proteins
D)Nucleic acids
E)All of these macromolecules are common components of biomembranes.
2
A solute crossing a biomembrane from a region of high concentration to a region of low concentration without the aid of a transport protein is most accurately referred to as:
A)selective permeability.
B)active transport.
C)passive diffusion.
D)facilitated diffusion.
E)fluidity.
3
True or False: Due to its structure, cholesterol adds to the fluidity of biological membranes.
A)True
B)False





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