Transfection is:
A. the artificial introduction of viral DNA into a bacterial cell.
B. the artificial introduction of viral DNA into a eukaryotic cell.
C. the first step (attachment) of a viral infection using a recombinant virus.
D. facilitated by treatment of cells with calcium chloride and heat shock.
E. useful when recombinant DNA is not introduced via infection by a viral vector.
B, E
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For a nondiabetic person, the greatest variation in glucose concentration occurs in this part of the circulatory system
A) femoral artery B) coronary arteries C) pulmonary veins D) hepatic portal vein E) jugular vein
RecA can facilitate strand exchange with a variety of substrates in vitro. Which of the following is not one of these structures?
A. a linear, single-strand DNA invading a linear duplex DNA B. a circular, single-strand DNA invading a linear duplex DNA C. a linear DNA duplex containing a single-stranded gap invading a linear duplex DNA D. a linear, double-stranded DNA invading a double-stranded circular DNA E. a linear DNA duplex containing a single-stranded gap invading a linear duplex DNA followed by branch migration to form a four-stranded intermediate
To estimate how much the means of a variety of like samples drawn from the same population might vary, which statistic is often used and what is its formula?
What will be an ideal response?
Which blood cell type is correctly matched to its function?
A. Platelets-hematopoiesis B. Erythrocytes-immunity C. Leukocytes-oxygen transport D. Leukocytes-blood clotting E. Monocytes-defense against microorganisms