Organism A has 70 moles % G+C, and organism B has 40 moles % G+C. Which of the following can be concluded from these data?
A) The two organisms are related.
B) The two organisms are unrelated.
C) The organisms make entirely different enzymes.
D) Their nucleic acids will completely hybridize.
E) None of the answers is correct.
B
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People who are lactose intolerant
A. produce inactive lactase. B. have a genetic polymorphism of the lactase gene that turns off lactase production after weaning. C. must drink soy (non-dairy) formula as infants. D. have a mutation in the promoter region of the lactase gene. E. have mutations in regulatory regions of the lactase gene.
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?
What will be an ideal response?
In the figure above, representing transcription, the item labeled "B" is
a. the nontemplate strand. b. RNA-DNA hybrid. c. DNA double helix. d. the RNA copy. e. the template strand.
Joan wants to discover a microbe capable of degrading an environmental contaminant. Which of the following culturing methods would be most effective for isolation of such an organism?
A) cell culture B) chemostat C) quorum sensing D) enrichment culture E) differential culture