The most likely identification of an anaerobic gram-positive bacillus that is a very large fusiform bacillus with one pointed end and one blunt end is:
a. Eubacterium.
b. Veillonella.
c. Leptotrichia.
d. Propionibacterium.
C
Leptotrichia are very large fusiform rods with one pointed end and one blunt end. Colonies are large, gray, and convoluted. They are most often isolated from the oral cavity or urogenital tract.
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The disease referred to as melioidosis is caused by which one of the following?
a. P. aeruginosa b. R. pickettii c. B. mallei d. Burkholderia pseudomallei
Answer the following statements true (T) or false (F)
1. Barr bodies are a diagnostic feature of X inactivation. 2. A human cell with a Barr body always comes from a female. 3. Genomic imprinting can result in offspring with identical genotypes that have different phenotypes. 4. The DNA methylation state of a zygote will be maintained throughout the life of the organism and then passed on unchanged to its offspring.
A vaccine that protects against infection of some strains of genital HPV also protects against:
a. cervical cancer b. AIDS c. autoimmune diseases d. breast cancer e. genital bacterial infection
Hiking a trail, you observe large, white flowers that produce a strong aroma and have large anthers. The pollinators likely to pollinate these flowers are
A. bats and moths. B. flies. C. birds. D. beetles. E. bees.