The laboratory method of choice to identify Mycoplasma and Ureaplasma infections is:
a. enzyme-linked immunosorbent assay (ELISA).
b. direct fluorescent antibody (DFA).
c. latex agglutination.
d. real-time polymerase chain reaction (PCR).
D
Several amplification methods, including real-time PCR, have been developed for the detection of the clinically relevant Mycoplasma and Ureaplasma species.
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The most likely identification of an anaerobic, curved, gram-variable bacillus with tapered ends on Gram stain of vaginal secretions when vaginosis is suggested is:
a. Porphyromonas spp. b. Actinomyces. c. Mobiluncus. d. Fusobacterium spp.
A woman with type A blood just had her first child. The child, like mother, had type A blood. What are all of the possible blood types of the father?
What will be an ideal response?
Which of the following statements concerning a blastodisc is false?
a. It can be further divided into an upper epiblast and below that, the hypoblast. b. It results from meroblastic cleavage. c. It is found in isolecithal eggs. d. It is a small disc of cytoplasm at the animal pole. e. It is characteristic of cell division in bird eggs.
What was one of the pieces of evidence most critical to the discovery of DNA structure?
A. the hydrogen bonding between different nucleotides B. its composition of four different nucleotides C. the discovery of its semi-conservative mode of replication D. the backbone containing sugar-phosphate linkages E. an X-ray diffraction pattern suggesting a double helix shape