Nucleic acid blotting is widely used in recombinant DNA technology. In a Southern blot, one generally ________
A) hybridizes filter-bound DNA with a DNA probe
B) ligates DNA with DNA ligase
C) hybridizes filter-bound RNA with a DNA probe
D) cleaves RNA with restriction endonucleases
E) examines amino acid substitutions with radioactive probes
A
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Answer the following statements true (T) or false (F)
1. Soil can contain the spores that cause botulism, gas gangrene, and tetanus. 2. Chlamydial genital infections and gonorrhea are the two most common nationally notifiable infectious diseases in the United States. 3. The levels of chlorine routinely used for water treatment are sufficient to kill Giardia cysts and Cryptosporidium oocysts. 4. Yersinia pestis, the bacterium that causes plague, is one of the pathogens most often discussed as a potential biologic weapon. 5. Gonorrhea is considered to be a communicable disease, but not a contagious disease.
A patient with acquired immunodeficiency syndrome (AIDS) notices skin lesions on his back that have begun to ulcerate. Upon physical examination, his physician also notices hepatomegaly that is most likely caused by hepatitis. The physician prescribes antifungal therapy to prevent the dissemination of which of the following yeasts?
a. C. albicans b. C. neoformans c. C. glabrata d. C. tropicalis
The primary producers for hydrothermal vent
ecosystems are a. chemoautotrophs. b. chemoheterotrophs. c. phytoplankton. d. cyanobacteria. e. algae.
Pain is
a. detected by certain free nerve endings. b. the perception of tissue injury. c. dependent on interpretation by the brain. d. the perception of injury and dependent on interpretation by the brain. e. all of these.