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Passive diffusion can be distinguished from facilitated diffusion by plotting tr

ID: 974647 • Letter: P

Question

Passive diffusion can be distinguished from facilitated diffusion by plotting transport rate (y-axis) against solute concentration ( x-axis), and noting that:
a. facilitated diffusion rates display saturation behavior with increasing substrate concentrations.
b. passive diffusion rates display saturation behavior with increasing substrate concentrations.
c. passive diffusion involves formation of a specific solute: protein complex, so the transport rate approaches Vmax at high solute concentrations.
d. proteins capable of effecting facilitated diffusion do so only if G < 0.
e. because passive diffusion does not involve formation of a specific solute: protein complex, the plot of rate vs. concentration is linear.

b & c a, c, & e b, d, & e a, d, & e

Explanation / Answer

A E and D are true