Which of the following is known as a Philadelphia chromosome?
A) a human chromosome 22 that has had a specific translocation
B) a human chromosome 9 that is found only in one type of cancer
C) an animal chromosome found primarily in the mid-Atlantic area of the United States
D) a chromosome found only in mitochondria
A
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An elderly man with chronic heart and lung disease develops Legionella pneumonia. By what route was the infection most likely to have been acquired?
a. Respiratory route, from an infected person b. Inhalation of aerosolized water from a source containing protozoa c. Inhalation of spores from moldy hay d. Exposure to livestock or animal products
Topoisomerases function to
A) remove nucleotides from DNA. B) join DNA pieces together. C) twist DNA molecules. D) attach DNA loops to scaffold proteins. E) move chromosomes along spindle fibers.
Which is incorrect regarding Q fever?
A. Transmitted by lice B. Causes fever, muscle aches, rash, and sometimes pneumonia C. Pathogen produces resistant spores D. Is a zoonosis E. Humans infected from unpasteurized milk and airborne spread
Chyme travels from the stomach to which specific structure?
A) jejunum B) pancreas C) duodenum D) large intestine