The Bacteria and Archaea are the ONLY domains in which organisms exist that can
A) catalyze the transformation of inorganic nitrogen species for biosynthesis.
B) assimilate nitrite.
C) conserve energy from the transformation of inorganic nitrogen species.
D) catalyze the incorporation of inorganic nitrogen species into biomolecules.
Answer: C
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Tetrodotoxin is a potent poison, produced by some newts, pufferfish, and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons. A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick. The most likely action the poison takes is
A. Mimicking a symporter and allowing sodium to rush out and potassium to rush in. B. Mimicking an antiporter and allowing sodium to rush out. C. Blocking an antiporter so sodium cannot rush in. D. Blocking a symporter and keeping sodium from rushing in. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the effects of tetrodotoxin on ion movement in neurons? What other information is related to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Rod-shaped bacteria are called:a
streptococci. b. bacilli. c. diplococci. d. vibrio. e. spirochete
The replisome has two main subcomponents. They are
A. the replication fork and the sliding clamp subunit. B. the replication fork and the DNA pol III enzymes. C. the DNA pol III enzymes and the sliding clamp subunits. D. the primosome and the sliding clamp subunit. E. the primosome and the DNA pol III enzymes.
Strongyloides stercoralis
A. can cause a fatal disseminated disease in immunosuppressed patients. B. rarely causes chronic infection. C. is ingested with food and does not migrate out of the intestine. D. is a tapeworm. E. All of the choices are correct.