Lemon juice has a pH of 2.0, therefore, ____
a. [H+] < [OH-]
b. [H+] = [OH-]
c. [H+] = 0
d. [OH-] = 0
e. [H+] > [OH-]
ANSWER: e
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The descending limb of the loop of Henle is permeable to _______________ but not to _______________
Fill in the blank(s) with correct word
In the regulation of the trp operon, tryptophan acts as a(n)
A) repressor. B) attenuator. C) activator. D) effector. E) operator.
Active transport
a. helps establish the resting potential of a neuron. b. counters the process of diffusion. c. allows transport of ions across the plasma membrane of the neuron against the concentration gradient. d. helps establish the resting potential of a neuron and counters the process of diffusion. e. does all of these.
The chloroplast ATP synthase
A) transports H+ ions from the stroma to the thylakoid space. B) is a nucleic acid complex. C) helps transport H+ against the concentration gradient. D) is embedded in the inner membrane of the chloroplast. E) couples the flow of H+ to the phosphorylation of NADP+.