Which dermatophyte usually fluoresces yellow-green under a Wood's lamp?
a. Microsporum gypseum
b. Trichophyton verrucosum
c. Microsporum audouinii
d. Epidermophyton floccosum
C
M. audouinii was, in past years, the most important cause of epidemic T. capitis among school-children in the United States. This organism is anthropophilic and is spread directly by means of infected hairs on hats, caps, upholstery, combs, or barber clippers. The majority of infections are chronic; some heal spontaneously, whereas others may persist for several years. Infected hair shafts fluoresce yellow-green using a Wood's lamp.
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Another name for a chromosome is a ________, because it contains alleles that are often inherited together.
A) linkage group B) crossing over group C) genetic recombinant D) bivalent
Under a microscope you see a tissue consisting
of flattened cells that is a single layer thick, has a basement membrane, tight junctions, and it lines the inner surface of the lungs. This tissue type is
a. simple squamous epithelium. b. simple columnar epithelium. c. stratified squamous epithelium. d. simple cuboidal epithelium. e. stratified cuboidal epithelium
In bacteriophage lambda, the establishment of lysogeny requires the protein product of which gene?
A) N B) cII C) cIII D) B and C only E) A, B, and C
The equation that would best describe the curve in Figure 53-1 is:
a. dN / dt = r. b. dN / dt = N. c. dN / dt = rN. d. dN / dt = rN + I ? e. e. dN / dt = rN (K ? N).