To introduce a particular piece of DNA into an animal cell, such as that of a mouse, you would most likely be successful with which of the following methods?
A) electroporation followed by recombination
B) introducing a plasmid into the cell
C) infecting the mouse cell with a Ti plasmid
D) transcription and translation
A
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You cut your finger dicing chicken for dinner. Which of the following is not a source of chemicals that stimulate the inflammatory response that results from the injury?
A. Antibody-producing plasma cells B. Localized leukocytes C. Bacterial cells that infect the wound D. Host tissues damaged by the knife
Calcium ions may act as second messengers by binding to __________, which then regulates other
proteins. a. adenylyl cyclase b. cyclic AMP c. calmodulin d. phosphodiesterase e. protein kinase
What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years?
a. marine snail fossils high up in the Andes mountains b. bird fossils at the top of mountains in Argentina c. dinosaur bones in the Amazon basin d. impressions of ocean waves at the top of a mountain
You are working in an aquarium that has been breeding an endangered species of fish for return into the wild. You have a batch of progeny from the first generation of breeding. The staff are discussing whether to return those fish to an area that has been completely depleted, or add them to a partially depleted population. "Considering the Allee effect, what do you say?
A. "The area with the other fish may reduce the partially depleted population's exposure to disease." B. "They may survive better in a large school, and will have an easier time finding mates." C. "They may do better in the empty area without any competition for territory." D. "They may do better in the empty area without any competition for food."