What is the effect of a beta-barrel on the permeability of a membrane?
a. It decreases permeability.
b. It increases permeability.
c. It has no effect.
d. beta-barrels are never found in membranes.
Ans: b. It increases permeability.
You might also like to view...
Why do scientists believe that most of the unexplored genetic diversity on Earth resides in viral genomes? Why is this genetic diversity important to human society?
What will be an ideal response?
The two-stage thymic selection process for selecting self-tolerant, antigen-reactive T cells results in
A) allelic exclusion. B) clonal deletion. C) complementarity-determining regions. D) somatic hypermutation.
Which animal is NOT able to use sonar as a form of "lightless vision" to navigate in dark environments?
A. shrews B. owls C. bats D. whales E. dolphins
The term herbaceous implies that a plant
A. is only found in wet environments. B. probably will live several years. C. has no apical meristem. D. has not developed a secondary vascular tissue. E. lacks vascular tissue.