Caring for patients infected with a new virus requires safety precautions for medical personnel. Choosing appropriate procedures is an example of a(n) ________ process.
A. inductive
B. pathogenic
C. deductive
D. hypothetical
Answer: C
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Bacteria that undergo natural transformation ____
a. are very common b. are strains of E. coli c. are subjected to electroporation to induce DNA uptake d. generally have a DNA-binding protein on the exterior of their cell wall e. integrate foreign DNA into their chromosome through conjugation
The cells of the anterior lobe of the pituitary gland secrete many hormones. What hormone that is not secreted from the anterior lobe of the pituitary?
A. Melanocyte-stimulating hormone B. Antidiuretic hormone C. Growth hormone D. Follicle-stimulating hormone E. Prolactin
Which of the following is required for formation of the open complex of replication initiation?
A. binding of DnaB helicase to single strands of the replication bubble B. binding of DnaC to the four 9-mer consensus sequences, which destabilizes the AT-rich repeat sequences C. binding of DnaA to the four 9-mer consensus sequences, which destabilizes the AT-rich repeat sequences D. DnaA/DnaC/ATP complex loads DnaA onto the origin and ATP hydrolysis allows release of the DnaC protein E. oligomerization of the HU protein upon binding the origin, and wraping of the DNA around the oligomer
You are asked to give a classroom demonstration of DNA supercoiling. To do so, you take two different colored pieces of rubber tubing, twist them very tightly and excessively around each other and join the ends of the tubing appropriately. Next, you relieve the supercoiling by breaking one strand and unwinding it. In this demonstration, the breaking and unwinding to relieve the supercoiling simulates the action of
A. ligases. B. primases. C. topoisomerases. D. polymerases. E. exonucleases.