Pickling is an effective means of food preservation involving
A) increasing pH.
B) increasing salt concentration.
C) reducing pH.
D) increasing both salt concentration and pH.
E) increasing salt concentration or reducing pH or both.
E
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The primary difference between simple and facilitated diffusion is that facilitated diffusion requires a membrane protein to act as a channel or carrier for a substance while simple diffusion means substances can slip through the lipid bilayer without a channel or carrier being needed.
a. true b. false
Polyomaviruses
A. cause common asymptomatic to mild infections. B. include the JC virus and BK virus. C. cause progressive multifocal leukoencephalopathy. D. cause problems in renal transplant patients. E. All of the choices are correct.
Which line in the graph represents the bag that contained a solution isotonic to the 0.6 M solution at the beginning of the experiment?
A) A B) B C) C D) D E) E
Red algae ____
a. are primarily marine organisms b. are thought to have developed from green algae c. contain xanthophylls as their main accessory pigments d. are mostly unicellular e. survive only in shallow water