A cystic fibrosis patient develops a severe respiratory infection that resists treatment with standard antibiotics. A specimen from the lungs is greenish in color and contains aerobic motile Gram-negative bacilli. The patient is probably infected with
A) Bordetella pertussis.
B) Burkholderia cepacia.
C) Klebsiella pneumoniae.
D) Pseudomonas aeruginosa.
E) Serratia marcescens.
D
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Which body structure is NOT composed of
epithelial tissue?
a. skin b. nails c. lining of the stomach d. cartilage e. all of these are composed of epithelial tissue
What is the surgical removal of cells, tissue, or fluid that will be analyzed for cancerous cells?
What will be an ideal response?
Atoms that bear a positive or negative charge are known as:
A. ions B. electrically neutral C. magnetic D. lacking nuclei
Within the transcription bubble, the 9 most recently added nucleotides in the newly synthesized RNA strand temporarily form a helix with the template DNA strand. How might transcription be affected if helix formation did not occur?
A. Rewinding the DNA molecule would be inhibited. B. Unwinding the DNA molecule would be inhibited. C. The position of the 5' end of the RNA would be unstable, inhibiting elongation. D. The position of the 5' end of the RNA would be unstable, stimulating elongation. E. The position of the 3' end of the RNA would be unstable, inhibiting elongation.