German measles is caused by the ________ virus.
A. coxsackievirus A
B. herpes-zoster
C. reovirus
D. rubella
Answer: D
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How can foreign DNA of greater than 300 kbp be inserted and stably maintained in BAC vectors?
What will be an ideal response?
In bacteria living next to hot deep sea vents the usual electron donors are?
A. Carbon compounds B. Iron atoms C. Copper ions D. Sulfur compounds
Microcystis aeruginosa is a species of cyanobacteria. What CANNOT be true of this species?
A. It synthesizes organic molecules. B. It is an obligate anaerobe. C. Its cells contain an extensive thylakoid. D. It uses ammonia to produce proteins. E. It secretes mucilage.
While documenting the synthesis and function of a eukaryotic gene, you prepare two solutions in which you are able to observe the gene being transcribed. Before the process is complete, you add a significant quantity of ?-amanitin to one solution, and compare the results after a few minutes. You find that the DNA in both solutions has been completely transcribed. What conclusion do you draw?
a. The gene is transcribed by RNA polymerase III. b. The gene is transcribed by RNA polymerase II. c. The gene is transcribed by RNA polymerase I. d. ?-amanitin has no effect on DNA transcription.